Malicious PDF — malware analysis report

Static analysis result for SHA-256 beebcb4d41dc34be…

MALICIOUS

PDF

73.6 KB Created: 2021-04-02 07:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: baf83bfac3613d303f4e842b650ffb07 SHA-1: 6cb6c0688dac56d6b1431189b562756be9fa7cdc SHA-256: beebcb4d41dc34be1176c2913d6d51aa09db93c5a1e5ffb6d621dcecbd9f46f9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution through these links. No scripts were extracted, and the document body was heavily obfuscated, making a precise determination of the final payload impossible.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/wix?keyword=diablo+2+lord+of+destruction+strategy+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/wifilivemij/hwhjham/valiant_hearts_the_great_war_part_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382781/normal_5fee6c71959be.pdfIn PDF document text
    • https://cdn.sqhk.co/nuduniguwufo/hdIgef5/zozanofenemudufef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_6048efba41259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423700/normal_5fe284c41a583.pdfIn PDF document text
    • http://tisiner.iblogger.org/audrey_font_family_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460694/normal_5fd7390f98ace.pdfIn PDF document text
    • http://filfex.ru/el_guardian_del_centeno_peliculacjjq2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417527/normal_5fc5973c9811d.pdfIn PDF document text
    • http://leree6.club/32222136050h4pph.pdfIn PDF document text
    • https://cdn.sqhk.co/zedawuzijis/EMggicj/28162544483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456686/normal_605198c83f249.pdfIn PDF document text
    • http://senteber.site/sato_cl4nx_problemsyn2wy.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/gjbcjjJ/yellowstone_national_park_lodging_xanterra.pdfIn PDF document text
    • http://changely.club/best_self_help_books_for_anxiety_and_stressjmdb8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409992/normal_60163664962f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486363/normal_6049bbeaae37d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403117/normal_5fc847d3550d9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_7a97a47d5c0e41a19a0a5f5ff57f1cf9.pdf?index=trueIn PDF document text
    • https://0f285ee0-1b14-49a2-8a3e-060a2db94812.filesusr.com/ugd/4bf67f_febebaef66aa4c31a6138344192f462b.pdf?index=trueIn PDF document text
    • http://topawod.epizy.com/enlaces_intermoleculares_del_agua.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_e2355c8971174c4abb90b4312cbe9bc5.pdf?index=trueIn PDF document text
    • https://5121d360-3808-4f61-aa44-d87cf2d9d428.filesusr.com/ugd/032e8a_f5f41011341343e895149de63a2346bc.pdf?index=trueIn 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_off0000e15f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15F 5696 bytes
SHA-256: 7cf00be6b4c12479270849808601cbee1fc55e318bcd216b40f7b161feede3f3
font_01_sfnt_off0000f4e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E5 10484 bytes
SHA-256: 5d346a724547550da27351d44ee17f79b4f9ee634e84304afefa6bdf6145e734

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