Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac6c75e38e1fb1ab…

MALICIOUS

PDF

100.5 KB Created: 2021-05-12 18:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 227f11d24f86bd41f89e9daa29d0f213 SHA-1: b01f6be90d6170576145c8667b5e163ae9e53a68 SHA-256: ac6c75e38e1fb1ab0fd2af4a82944cea5db5a567f59a56cff869cbe4ce971787
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 ML classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'link farm' heuristic strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mezovuduw.ru/strik?utm_term=federalist+70+arguments+quizlet PDF link annotation
    • http://xovebud.mygamesonline.org/xoguvukuvekejivilewiguso.pdfIn PDF document text
    • http://domensita.fun/phenol_formaldehyde_resin_market36b98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451355/normal_5fddd1071d54a.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/the_final_quest_rick_joyner_audiobook.pdfIn PDF document text
    • https://cdn.sqhk.co/darojopul/hbOeib1/ghost_hunters_movie_trailer.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CvgiczF/ragaduwojak.pdfIn PDF document text
    • https://cdn.sqhk.co/mosugukasiba/HgLihig/geseziko.pdfIn PDF document text
    • http://totaxusozavu.sportsontheweb.net/rousseau_social_contract.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/4wThiii/dino_city_rampage_3ds_cia.pdfIn PDF document text
    • http://hihikane.space/basic_electrical_electronics_engineering_notes9mf15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483337/normal_601ff44aa07c8.pdfIn PDF document text
    • http://lovepositions.info/susomivurm21dn.pdfIn PDF document text
    • http://fishland.store/jesus_at_the_center_lyrics_and_chords_key_of_apbsca.pdfIn PDF document text
    • http://berasowugixo.mywebcommunity.org/symmetry_operations_in_crystals.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/geometry_dash_lite_secret_treasurevlm0y.pdfIn PDF document text
    • https://cdn.sqhk.co/gawukale/DFrgimK/95253132598.pdfIn PDF document text
    • http://dkshlyap.ru/arb_association_risk_assessment_templatedjm7v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_60449737741b2.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/jupevovujuti.pdfIn PDF document text
    • http://topstop.site/842220374890o89p.pdfIn PDF document text
    • http://rukozhop-guide.com/how_to_write_sad_poetryyix9b.pdfIn PDF document text
    • https://cdn.sqhk.co/jiliroba/XjdAjfG/xugalelebesokigobome.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383131/normal_5fcb153b3aab3.pdfIn PDF document text
    • https://cdn.sqhk.co/baxijaxazixi/Zjhjgjj/zipuxifukozez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00014f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F99 5496 bytes
SHA-256: 743a79b01ed5ac81003bbb638c82a4460a81b07c9f9a4c0b028de7c211568578
font_01_sfnt_off0001623b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1623B 10060 bytes
SHA-256: 331eaf7f70167d9dfa05c01326947cf8763d02afd6269d7c3b8d3754b990a2a5

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