Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a9c5de48666971…

MALICIOUS

PDF

70.4 KB Created: 2020-11-10 11:39:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 654a87cdd9450944ce29ce8e74149b39 SHA-1: 16569e534af8d9134818885e205531f75d0dc948 SHA-256: 42a9c5de4866697116aca12aa1562ca71e85cb515aed3776c64654e69a9f835d
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning and directing users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL 'https://traffset.ru/aws?keyword=hobo+games+unblocked+6969' is likely the primary lure, while the PDF itself contains a large number of links, suggesting a link farm or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/aws?keyword=hobo+games+unblocked+6969
    • https://cdn-cms.f-static.net/uploads/4376601/normal_5f8de1d802ce1.pdf
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/2446fef6.pdf
    • https://gogebuzavoriro.weebly.com/uploads/1/3/2/6/132681212/5507230.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/baxekojojexusol/hardest_game_in_the_world_unblocked.pdf
    • https://s3.amazonaws.com/guxosa/nepix.pdf
    • https://s3.amazonaws.com/newopetusam/94247212203.pdf
    • https://s3.amazonaws.com/tadovu/dinamani_today_news_paper_free_download.pdf
    • https://s3.amazonaws.com/vososasoxumete/chevrolet_captiva_2012_owners_manual.pdf
    • https://s3.amazonaws.com/timafatafej/free_music_theory_games_for_kids.pdf
    • https://s3.amazonaws.com/winumigutam/13352931778.pdf
    • https://s3.amazonaws.com/fizaxo/32096066042.pdf
    • https://s3.amazonaws.com/vaxebisapesi/i_wish_i_had_one.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41c.bin
9ac31876932d75202baefa47e151b93695fca033f2497751b1dcc772eec2d731		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD41C 5636 bytes
font_01_sfnt_off0000e733.bin
2129943de5003810f519122335e079f47f3bfc361c92da15052f844753299b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE733 11404 bytes

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