Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa3fae1f5b3a269b…

MALICIOUS

PDF

123.6 KB Created: 2021-02-20 07:42:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5e6759066e9759819e9a5fea699ee75d SHA-1: 538bbb9ef3381260bdbbdbcb712e988a244dcdfc SHA-256: fa3fae1f5b3a269be116aec4ae377ec2cbae0410fdfbe131dbb94219bd2c18b1
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

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://seumenha.ru/strik?utm_term=dyson+animal+dc50+brush+not+spinning PDF link annotation
    • https://cdn.sqhk.co/kobewudojuvo/rjhiiAX/chess_free_download_windows_10.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454575/normal_60018cff25f29.pdfIn PDF document text
    • https://cdn.sqhk.co/sezabaxo/XihFIig/bafesowozumejavawifivoxuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474231/normal_5fd8a0a399053.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/ihU6gdz/33180575730.pdfIn PDF document text
    • https://cdn.sqhk.co/libewepigux/iggdJgg/43992304280.pdfIn PDF document text
    • https://cdn.sqhk.co/bopibege/ha9iagd/ice_cream_recipes_for_ice_cream_maker_cuisinart.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/jahjiXA/modern_warfare_warzone_secret_bunker_locations.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/ighfEib/55805422038.pdfIn PDF document text
    • https://lalinixew.weebly.com/uploads/1/3/4/2/134265361/39640947d224f1.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/lixisariwulo/85326520490.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/wheel_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/stephen_king_books_list_of_all.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/55256709625.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_off00019747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19747 5996 bytes
SHA-256: 0fcc82cd5d73c106247b5af8eeee139cc2dbecc1f334b61df4499b1db0184e2c
font_01_sfnt_off0001ab7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB7F 2712 bytes
SHA-256: 77df4b4d0b110b1f9c3e2835db2b016844fc44993c2352ad6eb79153358e10aa
font_02_sfnt_off0001b71a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B71A 12604 bytes
SHA-256: 426efb153609ec0c753ed1ab29ae0f23fbbf0c9c73430ddcf88b4531d4255034

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