Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bae934c9bbb557b…

MALICIOUS

PDF

74.0 KB Created: 2021-01-31 03:20:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9268ed30d2129c77f82244ec93ffc47 SHA-1: e815054dd0784a972e21bdf3578b291225bccc3e SHA-256: 3bae934c9bbb557b4b719c06bc277a715f6923234d630123fa2f027b64959bb2
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to 'https://jacksth.ru/123?utm_term=jeep+grand+cherokee+roof+rack', which is likely a lure for a phishing or malware distribution campaign. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to 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://jacksth.ru/123?utm_term=jeep+grand+cherokee+roof+rack
    • http://kokijejon.22web.org/38928467771.pdf
    • http://ndfnasg.xyz/corporate_strategy_jobs_washington_dcmbq76.pdf
    • https://cdn.sqhk.co/tadeketoxab/Lgj6Xix/27520430172.pdf
    • https://cdn.sqhk.co/zimuteraf/eIeS0kz/zalusivizovovixuxaket.pdf
    • https://cdn.sqhk.co/mitugejaxel/d54Nohd/drum_sets_for_beginners_yamaha.pdf
    • https://static.s123-cdn-static.com/uploads/4382638/normal_5ffad64d9e2ad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fufopabi.rf.gd/lefuvikukipazovifoputa.pdf
    • https://s3.amazonaws.com/gajabedafot/nosuvugobusesogugopaken.pdf
    • https://s3.amazonaws.com/ruzaganog/cassytha_filiformis_florida.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/bourree_bach_piano_sheet_music.pdf
    • https://s3.amazonaws.com/fibesezati/83603337472.pdf
    • https://s3.amazonaws.com/lodazojamuva/sesavakexixes.pdf
    • https://s3.amazonaws.com/mivokozibu/fortescue_metals_group_annual_report_2016.pdf
    • http://zepibugab.rf.gd/88029320618.pdf
    • https://s3.amazonaws.com/lazolu/wwe_3d_games_for_mobile.pdf
    • http://dolifusekaxug.epizy.com/75637320698.pdf
    • https://s3.amazonaws.com/vaxebisapesi/pulojanoxebuw.pdf
    • 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_off0000e50b.bin
cd639a74f3d7d815aea77e5e65baeb8ce690802cb536395005078ab856c54c59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE50B 5260 bytes
font_01_sfnt_off0000f6f4.bin
ab9398202f0773386f2494c163de4a42b8db400fdb53c17d3c0bec154a005e32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 10520 bytes

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