Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d8232271b214cd4…

MALICIOUS

PDF

68.3 KB Created: 2020-12-20 21:13:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 59b0155606cfeb9a9d8bbbd892fa69e0 SHA-1: ea27a28d3db628bb5579177875db83ee20cffdbf SHA-256: 5d8232271b214cd4d76dd15d99602535a7fdf8709a91bdcc6d06fd9e2ae192ba
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafficel.ru/123?utm_term=1995+7.3+glow+plug+relay+wiring+diagram PDF link annotation
    • https://funogumoduwe.weebly.com/uploads/1/3/4/3/134309977/pizuv_teviwidiwa_suzizut_wegekajel.pdfIn PDF document text
    • https://laputamobo.weebly.com/uploads/1/3/4/7/134763437/913743.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463286/normal_5fde1f95bd6bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8878ea79d16.pdfIn PDF document text
    • https://mabudorowux.weebly.com/uploads/1/3/4/4/134458492/86dde35.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/owners_manual_for_husqvarna_z248f.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5cd2fa04221c7117b7e6/1606376680902/91409408005.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/tanimubepamafix.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/bellarine_secondary_uniforms.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62dc1972c46e3c969869/1606378206012/eastside_baptist_church_memphis_tn.pdfIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/cricket_champions_cup_2017_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/88501660474.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_off0000cc68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC68 5808 bytes
SHA-256: 1aa13db8d640ad9f2d764ec24bf742a0a59fb551cf0113cb2f4fbe5da9ce2975
font_01_sfnt_off0000e040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE040 10584 bytes
SHA-256: 5511b15244fef83b74428cfd95d94cab9bad28ee13660969ebb8df473c92732c

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