Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d3a9be06946102…

MALICIOUS

PDF

303.3 KB Created: 2022-03-19 04:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-27
MD5: 50501569b83488f8b94701b3b52381a7 SHA-1: 90f66ba019c6b0be63bd94ff88b2151f970bcec2 SHA-256: c5d3a9be0694610236db5ac0a8833a0b596580763994aeab0eb3f5767e52f8a1
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple URLs, including one pointing to a compromised WordPress upload directory. The presence of PDF_SEO_UTM_REDIRECTOR_LINK and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a lure designed to trick users into downloading further malicious content. The embedded JavaScript likely facilitates the execution of malicious actions or the download of additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6043

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://fecuq.co.za/XSRYdR1H?utm_term=epilepsy+guidelines+malaysia+2017 PDF link annotation
    • https://biaplan.hu/images/fck/files/90683595660.pdfIn PDF document text
    • https://georgewongdesign.com/gwd/upload/files/77918725994.pdfIn PDF document text
    • http://blog-lunettes.top-lunettes.com/userfiles/file/90683977626.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/zivamujajasuziliwejuf.pdfIn PDF document text
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/9ffbb339beeaec811cd277b514962cf3/waxidefibubuloraxapeka.pdfIn PDF document text
    • https://cpc-serbia.org/js/files/87174658625.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/butelir.pdfIn PDF document text
    • http://kaie.org/userfiles/file/20220223134449.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/depuwesixenepugupeb.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/kapezelopu.pdfIn PDF document text
    • https://fenix-arm.ru/kcfinder/upload/files/18523610183.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/befoxizol.pdfIn PDF document text
    • http://kaoli88.com/upload_fck/file/2022-3-9/20220309235508696653.pdfIn PDF document text
    • https://kueapem.com/contents/files/xivixawavutisupip.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/43161430253.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/jilivevakusevemaxofe.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/tusorexakunus.pdfIn PDF document text
    • http://valk.dn.ua/js/kcfinder/upload/files/toxodugoxifadegidameb.pdfIn PDF document text
    • http://sankoux.jactokai.net/kcfinder/upload/files/88341802101.pdfIn PDF document text
    • http://topliving.sk/userfiles/file/moguwewazatugorizaw.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/70717896285.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/goviba.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/88475413531.pdfIn PDF document text
    • https://personnelstrategies.net/userfiles/file/sarimarejalomuxuwisaku.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16209f44c9d596---sedafiko.pdfIn PDF document text
    • http://119pump.net/d/files/863755662.pdfIn PDF document text
    • http://kielcenoca.pl/files/file/bixeberutedivobamanalunit.pdfIn PDF document text
    • http://teakdeck.pl/files/file/42309559211.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/28176745498.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/161fce1fbd3ae9---83864082694.pdfIn PDF document text
    • https://www.takaotakano.com/kcfinder/upload/files/vamodujifenewafinewezelu.pdfIn PDF document text
    • https://fotobolfestmeny.hu/mvc/userfiles/file/vedavinokafuni.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f8027bd0ba14f52099ae27937c2b2f18/62393894849.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/14582283432.pdfIn PDF document text
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/mulilatafareniravasis.pdfIn PDF document text
    • http://goldmustang.com/files/files/99203785100.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/1393583056.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///najiwexuluwikavojajope.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/kumigakebumuvepesusoge.pdfIn PDF document text
    • http://kingkady.com/uploadfile/files/52664654205.pdfIn PDF document text
    • https://groclin.com/img/uploads/files/55328675420.pdfIn PDF document text
    • http://www.barbantie.com.br/admin/plugins/ckeditor/kcfinder/upload/files/zipufesisejidokal.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/9460913553.pdfIn PDF document text
    • http://nepaldristi.com/dbros/public/ckeditor/kcfinder/upload/files/gimenaz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    +3 more URL(s)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00044a98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44A98 18848 bytes
SHA-256: a20234e8d6b944d53c251e19932b1f9b80f5304f01c8d3b966a4ba8e878cfe54
font_01_sfnt_off00047c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47C11 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00049333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49333 10956 bytes
SHA-256: 67aa6dae8453e94e04efdeecf5c1d816f434640a116168adf63c5e4489face8a