Malicious PDF — malware analysis report

Static analysis result for SHA-256 b863edacd858a754…

MALICIOUS

PDF

117.9 KB Created: 2021-03-10 22:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 62a0eb47a4928177d4a4661947c4cc7d SHA-1: e63eb7d1e4e6b051dbc9f54be0c5ae5131eb6bc9 SHA-256: b863edacd858a75483402d0f74c30411bf463bb72b62b4ae0718072440b3bd31
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, contains references to 'Vmware hol labs pdf' and is associated with numerous URLs, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure point towards an attempt to trick the user into accessing malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://zajinet.ru/award?keyword=vmware+hol+labs+pdf PDF link annotation
    • http://repair-telefonov.ru/82932827747mjfmb.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/cjgd1WY/gumoloxakage.pdfIn PDF document text
    • http://vigastlens.xyz/d_d_5e_character_sheet_monkjzcrq.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/aiahaUV/crowd_control_barrier_posts_with_retractable_belt.pdfIn PDF document text
    • https://cdn.sqhk.co/gukugifixija/ejcgehg/paladone_duck_shoot_carnival_and_fair_interactive_game.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_60357ee6d96fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378157/normal_5ff29ab83ed69.pdfIn PDF document text
    • https://cdn.sqhk.co/zewesifadeka/LPxzghK/6th_grade_math_vocabulary.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/ZJPiaZW/64036565593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412170/normal_60483199b7c71.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/hJggifx/biniw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5fd917af5b23c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419218/normal_5feff31354185.pdfIn PDF document text
    • https://cdn.sqhk.co/gabironero/jgic9hc/best_to_worst_slayer_albums.pdfIn PDF document text
    • http://tacfitproducts.com/94534890919zkt8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446283/normal_5ff0d176bbb48.pdfIn PDF document text
    • https://cdn.sqhk.co/xogatijixe/7jgFPQF/27220534059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_601f232564fc5.pdfIn PDF document text
    • https://cdn.sqhk.co/zanemulazif/geicidI/hurt_the_hangover_3_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuxafe/chibhek/raceroom_racing_experience_store.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_off00019365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19365 5476 bytes
SHA-256: 7f1ec24711b82d33639912d1a12f5c022874f9cec6e8af19c0d689859763701e
font_01_sfnt_off0001a5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A5E5 10732 bytes
SHA-256: 358337d7c797d3fd8509e0efe3f74275117f6373c93731b4479d88b7246bb041

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