Malicious PDF — malware analysis report

Static analysis result for SHA-256 462a36a4b5a4167f…

MALICIOUS

PDF

72.3 KB Created: 2020-11-19 05:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 897364124b39bc16e22fde444d033c27 SHA-1: 170c511da17ea05c71a741856f1b7a1d67e71f3e SHA-256: 462a36a4b5a4167fcf001b26149417cc1ebb6dba3199d10f5ecf7cc11a8465d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, identified as a link farm, and a specific URL pointing to a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafffe.ru/strik?utm_term=tvplus+digital+tuner PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f99e27aa0785.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/jimijunatadusok_vejufate_retubumekarorij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_5fac35cae16dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379471/normal_5f91b2c91fbed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372382/normal_5f8abdd286b77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411917/normal_5f95487e682e0.pdfIn PDF document text
    • https://tumupapixukuju.weebly.com/uploads/1/3/4/8/134852222/57984bd588ccf5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422392/normal_5fb4673febfbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_5fa2f79f8ba7a.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/7885719.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473890/normal_5fabef7ece22e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f870eeeca887.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/55fcc815-798b-4dbf-b661-528eb8bf1a43/dupajavezeliv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fbda64e-38b1-4221-a3c5-2d436d603305/foundations_of_materials_science_and.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/831a22f8-3961-4256-b263-ac40660dad08/79254904539.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
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 4908 bytes
SHA-256: df3e4f1629a43d604a33bbafcf9eaa8e6dd28b50bbae17b5659447f1dbe439b1
font_01_sfnt_off0000e16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16A 10752 bytes
SHA-256: 38f035e23def2f39f6502109df33aa58727337ca5b8f60f25015b30744966103
font_02_sfnt_off00010654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10654 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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