Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a29acc702f27a2b…

MALICIOUS

PDF

81.9 KB Created: 2021-03-19 20:59:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 295e18782d055d59e91d731ee03cb7c8 SHA-1: 254b2bba86ba7b4208a896a4c52b2a6fb0d20122 SHA-256: 9a29acc702f27a2be471c95203f5254960b33a1d332916c4f5e31ab6e98f06a8
176 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a phishing lure using an SEO redirector. The embedded URL `https://kuzutuzo.ru/strik?utm_term=quick+street+fighting+techniques` is a key indicator of this phishing attempt. No scripts were extracted, but the PDF structure and associated URLs strongly suggest a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://kuzutuzo.ru/strik?utm_term=quick+street+fighting+techniques PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422148/normal_5ff5526a860ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5fd36b9361d6b.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/7980872.pdfIn PDF document text
    • https://negogepif.weebly.com/uploads/1/3/0/7/130775604/koladufij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393358/normal_5fc81a36b20f5.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/black_mens_curly_hairstyles_2020.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/juwoz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5ff291c968fe9.pdfIn macro / runtime command snippet
    • http://wajofima.mywebcommunity.org/les_signes_cabalistiques.pdfIn macro / runtime command snippet
    • https://wujemalevimovud.weebly.com/uploads/1/3/4/4/134470439/fikisadidarala_jakuvemezereta_fedunuwokekipap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382782/normal_602d26f894347.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_601ed03de50fb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494893/normal_5ffc667981a6f.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.neIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db252c80-2f49-4cf1-b72c-8eb84ccfc46a/2000_jeep_grand_cherokee_lift_kit.pdfIn PDF document text
    • http://bupalim.atwebpages.com/is_thrawn_a_villain.pdfIn PDF document text
    • http://zuzopejorexa.onlinewebshop.net/71409439444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c65e5722-34d1-4971-bdd0-5e21c424157b/tidal_power_plant_pros_and_cons.pdfIn PDF document text
    • http://kegigija.atwebpages.com/tarot_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cfd8f13-82ed-4060-8200-fb4168c184d2/gexuvafijawagekijujidaw.pdfIn 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_off00010369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10369 5152 bytes
SHA-256: 5e6eafcfc86a9920b7703a678ee68d0c453c10a53e6f7b11843fa27f501a584b
font_01_sfnt_off000114f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F5 10616 bytes
SHA-256: 75479b86cc1837523a16666867196e946abd9732a50ea68de457a19d3672ef73