Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a28885391950e4…

MALICIOUS

PDF

71.4 KB Created: 2020-12-20 03:21:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 16c8d302731c86ebcaa3fb8b8dac1763 SHA-1: bf47d7c8921e422e82463db6496f8f33738e566c SHA-256: 85a28885391950e483c659fc0a9d192e115445315c68e538753402265b414b9f
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for SEO link farms and phishing. The primary malicious URL identified is trafffe.ru, which is likely used to redirect users to further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=racing+games+unblocked+games+at+school PDF link annotation
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/bikoxodep-gonuwaxujarel-venuwape-mimabovo.pdfIn PDF document text
    • https://bewepuxajijasi.weebly.com/uploads/1/3/4/3/134362307/903996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369329/normal_5f913c29da073.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0d6092e537a05ef08bc6e/t/5fc6d233a907d7439cc790be/1606865460299/kpop_music_video_sets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e80778e1-8da7-45a8-822c-d2248ebe4f76/63024430045.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2d1e98ef7301f8b1d4447/t/5fccf9ccc00f007ceaea032a/1607268812412/nerf_zombie_strike_sledgefire_review.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/seniwipitosudupavu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/35570236198.pdfIn PDF document text
    • https://s3.amazonaws.com/godewumazek/mistweaver_monk_azerite_traits_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50b922e537a05ef23ad8d/t/5fc81c3d2dd5737571a74912/1606949950890/10660641354.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf59edae50a0145868aeb/1606219167944/operating_instructions_anne_lamott.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC6 5468 bytes
SHA-256: 33d8fd9eaf336d92d87f78fb10f566647f5aef951cfeffb30a38e57f45221e6c
font_01_sfnt_off0000ee38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE38 10048 bytes
SHA-256: f6053cac039c8b4603976f8abc4081a2c23685a926a9045a12956cd6fd003630

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