Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef12df1fa8e7128…

MALICIOUS

PDF

73.6 KB Created: 2020-12-19 15:03:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7b589d986bf5599d61de508c4396da14 SHA-1: 5f5502e72cf04f005ecde62164e8d81868334330 SHA-256: 9ef12df1fa8e7128bf3eaa84cebf472e0ce8c33666edeb52fcaad73cc43566a1
186 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is part of a link farm designed to redirect users to external URLs, with one prominent URL being trafffi.ru. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded links point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://trafffi.ru/strik?utm_term=projection+alarm+clock PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414152/normal_5fc5e9252575e.pdfIn PDF document text
    • https://dixaxotobaba.weebly.com/uploads/1/3/4/3/134377978/3586425644.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5fd7ded2c834b.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/majakisetaperini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405430/normal_5fd879436c756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_5f8f168695f06.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412584/normal_5fc5f346bdd83.pdfIn PDF document text
    • https://maxifabosogup.weebly.com/uploads/1/3/4/5/134526580/nemeguwilikenutu.pdfIn PDF document text
    • https://xomevore.weebly.com/uploads/1/3/4/3/134346529/xokug_zebetevipeloluv_mukupid.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/1202752.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://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf09b9b1ed035389f7ab3/1606283419427/zexatilinitita.pdfIn PDF document text
    • https://s3.amazonaws.com/jarawaxanivu/xodinepanofekuwenajoxaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb9be4ff-21bb-4e4f-a4c6-6120a382ee88/80205669890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49e38bab-cce0-4ac8-abd7-bc36935b3fbd/mebab.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/childhood_mental_disorders.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_off0000d7b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B8 4696 bytes
SHA-256: 32ec1e4522d313fd72801ccf12e8bd88124667e29813e33a8f6e2561c7f762aa
font_01_sfnt_off0000e788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE788 10532 bytes
SHA-256: 6d6e2c86d53c4c22cc3503b4563671e97ca0f928a388be5b05175366c8c66d73
font_02_sfnt_off00010b93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B93 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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