Malicious PDF — malware analysis report

Static analysis result for SHA-256 4259752651972cb8…

MALICIOUS

PDF

93.8 KB Created: 2021-06-27 21:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-15
MD5: 39e9286657671eeba1646647ea5a6b65 SHA-1: fe69ef2c5d2e235e364bc844428ce84cb7445806 SHA-256: 4259752651972cb85b70c0e50ab4409dd5ff3c4577b71492b9a63318b6b3367f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to PDF files hosted on compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of a link farm suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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 http://meandnetworking.com/ckfinder/userfiles/files/gufutazujobofanodoxajaj.pdf In PDF document text
    • http://ksnjl.com/userfiles/files/kuwolo.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/dttcmbnvjrn2mq22r6s05h0haa/buzejadezasemibonar.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/zojanoximofovetimuget.pdfIn PDF document text
    • https://www.sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b5598019de---zotili.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1607fa3dc2ee19---33253404886.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/11009385477.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/5552v7i0bt8jig9li4ar6ev0u5/retufisenalepajidixalulu.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/daaed6ad2460a9bd9de35577a9e97422/25752678982.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/ad83354fe7675914d66043820ad09aef/sofegusidumefelopen.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/0c22bfb9416655d31f6b6b059a4a4eb4/zixote.pdfIn PDF document text
    • http://jarauwerdaenzn.nl/userfiles/file/bibek.pdfIn PDF document text
    • https://privatecambodiatour.com/userfiles/file/85866415867.pdfIn PDF document text
    • https://activepymes.com/pub/file/56570227376.pdfIn PDF document text
    • https://noddy.nu/images/file/fumitafewaluwelemup.pdfIn PDF document text
    • http://mcutech.net/upload/2021/06/file/1624627741795538192.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/t08e1lbtvqdmjse1q6i97k4hp9/diwijiv.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/60056950668.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/74866208811.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/80476465473.pdfIn PDF document text
    • http://greenplanetnepal.com/userfiles/file/nuziremitegosanufomopajaw.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/22874468684.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160983bddcb7ee---kibomavisimugurevabipe.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/aitli92t3nbvilavdpe1m3eelm/97624389669.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/fuzudozu.pdfIn PDF document text
    • http://geyikkimya.com/userfiles/upload/file/fowobawajofikuwajamufi.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d1e87ad06---pobupagaziwur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=wolf+that+looks+like+a+dogPDF link annotation
    • 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
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D33 10512 bytes
SHA-256: 33969244d35466f76343b09a01fa6b767de6474b05166af1f48a0dc959bde4ba
font_01_sfnt_off00012512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12512 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D24 17268 bytes
SHA-256: 995c249c85135f712d3c08c1e2730c746d6847faf76d80a400f40389e6facb8a