Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f9f4b0090879fe…

MALICIOUS

PDF

72.8 KB Created: 2021-03-08 01:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c167fbdf111a15f294da84a1f8dc2215 SHA-1: 535f8249a295d53578193ed6c4f7f21fa50dfcd9 SHA-256: b0f9f4b0090879fed5b40f1787250164d385093bad58c98ebd1f10afbf500882
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious content. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, appears to be a lure related to game instructions, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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
  • 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://lozipotod.ru/wix?keyword=heads+up+board+game+instruction+manual PDF link annotation
    • https://cdn.sqhk.co/zawitagevute/ieRjdij/minecraft_mod_secret_rooms_1._7._10.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/10618974332.pdfIn PDF document text
    • http://furofosozunonew.22web.org/pugukafu.pdfIn PDF document text
    • https://cdn.sqhk.co/zedugixaka/BoPggkY/gafalogolipisimoreki.pdfIn PDF document text
    • http://mushygushysayings.com/88002296311uo6t2.pdfIn PDF document text
    • http://avto-trokot.xyz/24416928504a4gmm.pdfIn PDF document text
    • http://xufegabuxugil.iblogger.org/discrimination_and_harassment_policy_template.pdfIn PDF document text
    • http://gejokakop.mygamesonline.org/53695516863.pdfIn PDF document text
    • https://cdn.sqhk.co/pofifarim/egYjdQ7/vintage_apple_computer_wallpaper.pdfIn PDF document text
    • http://titanof-filtr.ru/65544401623wb0c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_de1023ff19be4df0a27f97926165a877.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_5278ff0871a84e72a08578ffdaa268db.pdf?index=trueIn PDF document text
    • https://6f2fb29c-15f2-4b08-b525-3eb91a7f0a41.filesusr.com/ugd/c3548c_f942188e59a84650afc7fa3a239b187c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/purdue_owl_full_block_letter_format.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/sky_sport_live_tv_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/86889668583.pdfIn PDF document text
    • http://guwuwusiva.rf.gd/how_has_soccer_affected_the_world.pdfIn PDF document text
    • http://negatesuxa.epizy.com/on_managing_yourself.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/pelavalefozo.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/storage_platform_bed_frame_with_drawers.pdfIn PDF document text
    • http://vuroxazejugu.epizy.com/optiplex_755_motherboard_specs.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_off0000e02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02C 5496 bytes
SHA-256: e69b6f2f52f05a7e0e9497c541facf6c5e82ce31fadc7c6d99ab154c5b7463ab
font_01_sfnt_off0000f2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BB 10296 bytes
SHA-256: 64548530d594eed22738f50054e65e2001df44b9321258d5bff092aace4ce412

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