Malicious PDF — malware analysis report

Static analysis result for SHA-256 af0462771d025f33…

MALICIOUS

PDF

43.4 KB Created: 2021-09-12 17:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 4e1e62f6a0b4c9f6a1808582a07be934 SHA-1: d3f2c010af5fd689faa3c9171ad3823c0ee387e6 SHA-256: af0462771d025f33feb9f8a9eba04e3c0d4525782898e40b6e8f7aff9264e706
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.6730

Heuristics 4

  • 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 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
  • 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 http://zhizhencn.com/filespath/files/20210908165839.pdf In PDF document text
    • https://damsindia.org/admin/uploads/file/zelugogefijinitegud.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/88fcc6463b5fec2c1c844954284961e4/mosepiwuvisokikibazid.pdfIn PDF document text
    • https://kar360.com/resimler/files/vogibipetadoj.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/56224482720.pdfIn PDF document text
    • https://xn--z4qq44i.tw/upload/actfiles/69893665268.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/1755809680.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/qkgbcpusrijbjhmfho32o2v8h6/97690448844.pdfIn PDF document text
    • http://teknis.it/userfiles/files/13297700521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=iphone+live+wallpaper+makerPDF link annotation

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