Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bd6f3a4e86a9f2…

MALICIOUS

PDF

87.0 KB Created: 2021-10-09 03:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: fd0a93ef4e542425ea5319cce09e7842 SHA-1: eec7f19c05f1dd8cc84340c22b50e65415a9ea2e SHA-256: 74bd6f3a4e86a9f275558e8a2d3fd1ea9229f542871620b084c4b1b14cbe9290
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of JavaScript indicates an attempt to execute code, likely for further exploitation or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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 https://www.afoa.org.ar/backend/ckfinder/userfiles/files/tuwegozifawigivorudirav.pdf In PDF document text
    • http://perechen-izdaniy.ru/js/ckfinder/userfiles/files/58674390072.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/28824400020.pdfIn PDF document text
    • http://standdominica.org/files/files/41460294259.pdfIn PDF document text
    • http://cimkezes.hu/uploads/ckfinder/userfiles/files/gapojadopuda.pdfIn PDF document text
    • https://go2germany.ru/files/file/lujufefa.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/laxikasibegubetewegakis.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/jotaku.pdfIn PDF document text
    • https://sieuthimaytinhcu.vn/upload/files/sigakezowo.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/sapiveseg.pdfIn PDF document text
    • https://marikakozmetika.hu/editor_up/situlakovifaz.pdfIn PDF document text
    • http://vibestedu.com/_UploadFile/Images/file/dovugomivugusokunomo.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/7cd91ee4db0f37a21c899c5d1e9daf79/vibodamikolofevelosule.pdfIn PDF document text
    • http://websteravelandscaping.com/editorData/file/47370772732.pdfIn PDF document text
    • http://taxfreepoint.com/file/wisixivakamorokikomabom.pdfIn PDF document text
    • https://wangwangcamp.com/uploads/files/202110032027124748.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/16131ada4b9ff4---1494373753.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ce8416d37---vusixazozifej.pdfIn PDF document text
    • http://ed-union05.ru/files/file/29739512489.pdfIn PDF document text
    • http://mercuresamuichaweng.com/admin/file/11008412888.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/161352ffe96db3---74911441660.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=p+value+in+statistics+meaningPDF 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_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 10520 bytes
SHA-256: e08fd54a6f72b046b8b74225b9a7fce45992d6fb4c09f1585e3ba56dbdf123fa
font_01_sfnt_off0001010a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1010A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001191c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191C 20092 bytes
SHA-256: 91308b8042d29a3fc3c8ccee38998a467b3ba07f2e5119f1fede1087288e0b2b

Open this report in the interactive analyzer, or submit your own file for analysis.