Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce8ee4bc9bee65d…

MALICIOUS

PDF

81.9 KB Created: 2021-03-24 12:13:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2148d2312f0417f0b7752ecff0e5dc0 SHA-1: acf3e033e92ff6ee47f70d7127fc4589abf7de5c SHA-256: cce8ee4bc9bee65d07381b8fe449e58155c9ae5d96d6f5bfa332e81ce80731b9
156 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to direct users to potentially malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing or malware distribution. The document body, though corrupted, suggests a lure related to 'cable tv guide omaha ne', which is likely a deceptive pretext to encourage clicks on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=cable+tv+guide+omaha+ne
    • http://bogplaktnc.fun/alvida_alvida_noha_freeoz50b.pdf
    • http://graatorama.space/hegen_teat_guidesx0du.pdf
    • http://p-kavkaza.ru/80937359929iqxxb.pdf
    • https://xujikipige.weebly.com/uploads/1/3/1/3/131379844/movadixa.pdf
    • http://unlockdeals.shop/english_words_and_their_meaningq2w6w.pdf
    • http://martakkord.ru/can_you_make_jerky_in_a_food_dehydratorenwz6.pdf
    • https://lezevonunibo.weebly.com/uploads/1/3/4/5/134577944/3697b73b27a49.pdf
    • http://lnstagramcopyrightmanagement.com/213389444132vyi2.pdf
    • http://laserisesiseno.getenjoyment.net/kamubaxako.pdf
    • http://trydouche.xyz/how_to_upgrade_zoom_meeting_time4g0fb.pdf
    • https://valiwuvubeke.weebly.com/uploads/1/3/4/6/134694219/fabixanifodofoxupo.pdf
    • http://4338bacchus.com/75702864067luayq.pdf
    • http://zuvalasit.mypressonline.com/toner_para_hp_laserjet_pro_400_color_mfp_m475dn.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vukusa/vw_polo_6r_service_manual.pdf
    • https://s3.amazonaws.com/jukoxisojow/calfresh_income_reporting_threshold_2018.pdf
    • https://s3.amazonaws.com/lekezaru/cassandra_personal_use_regular_font_free.pdf
    • http://wazeniwemir.onlinewebshop.net/luxesapifuxawajawa.pdf
    • https://s3.amazonaws.com/tupofelasujewas/pufojovuregaz.pdf
    • https://s3.amazonaws.com/tesotiwapax/midapo.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_off000103be.bin
5e828613feea62a988fe67a50cbd127c55577d0578ef7de90f5eb435bba2bc83		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103BE 5068 bytes
font_01_sfnt_off000114d8.bin
f008a06e0efdf72b076308547d4424857e3ca3095afb928bfb1cdeae6536c7b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114D8 11272 bytes

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