Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b2c395251f9009…

MALICIOUS

PDF

77.0 KB Created: 2021-03-24 08:35:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6b534947ebdee37749b3d0109b9878ef SHA-1: 7735d7553e365bcd96c563634d51fa208fe92155 SHA-256: e0b2c395251f9009cf52c3f5a80ee27d2d927c9680c418e4a698025770ce3c32
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains and appears to be a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The embedded URLs and the document body suggest a phishing or scam attempt, likely using a search result lure for 'sarcoptic mange dogs treatment uk'. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=sarcoptic+mange+dogs+treatment+uk
    • http://bonusiotsbera.online/jabofaduzufogatbczw.pdf
    • https://cdn.sqhk.co/xamapetarel/TENgdiC/mukipovoraretifezamol.pdf
    • http://present-mag.ru/fistulogram_radiology_reportgbztq.pdf
    • https://cdn.sqhk.co/gutinisiv/fiejfgd/f1_manager_pc_mods.pdf
    • https://static.s123-cdn-static.com/uploads/4416151/normal_5ff5db4d20d25.pdf
    • http://upgrade4me.com/jedokaxannr9m.pdf
    • https://cdn-cms.f-static.net/uploads/4418970/normal_600f10e0541b1.pdf
    • http://paypallsecurity.com/alfa_romeo_giulia_manual_swapx3u75.pdf
    • http://org-fruit.space/birinofukiduzarivavsv6sg.pdf
    • https://cdn.sqhk.co/fazejitev/Edjh3ja/general_knowledge_pub_quiz_questions_and_answers_2018.pdf
    • https://cdn-cms.f-static.net/uploads/4451363/normal_602e7d5e1432b.pdf
    • https://static.s123-cdn-static.com/uploads/4388160/normal_5fcceb7876a0a.pdf
    • https://static.s123-cdn-static.com/uploads/4467038/normal_5fc946627fc2f.pdf
    • https://cdn-cms.f-static.net/uploads/4464720/normal_6057ffce8181d.pdf
    • https://cdn.sqhk.co/kinemefuwa/bif5idW/75462962542.pdf
    • https://cdn-cms.f-static.net/uploads/4368481/normal_603275740a8ec.pdf
    • https://cdn-cms.f-static.net/uploads/4451033/normal_600c3ce49e789.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zimakufupakafor.rf.gd/de_que_trata_el_libro_la_riqueza_de_las_naciones.pdf
    • http://rebokomixuxoj.epizy.com/87751539996.pdf
    • https://033a7475-7ccb-45c1-8f1e-38fd320d48d0.filesusr.com/ugd/03a576_7b7902233385418bb383e8e98f6cb78c.pdf?index=true
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_a63a4cb1927741b78bb5b8d8d9e4543e.pdf?index=true
    • 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_off0000ec45.bin
0a9051239621f333597634608b41049c6eff7e934b7a05525aaa41a72659371c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC45 5528 bytes
font_01_sfnt_off0000feff.bin
7a3dad614cb7bd516851415929387c2e39f1c835f3ca01154dbe38f41805648b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFF 11124 bytes

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