Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7e04c5bbdd8c457…

MALICIOUS

PDF

68.0 KB Created: 2021-01-08 01:41:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ad78ff76361bc3b355499246e50ae1ec SHA-1: 739eaeebaf930b74b82e849bce65868b661dccfc SHA-256: c7e04c5bbdd8c457e5e840bd20008bb1f39a79b4cd32041ea930de7171e84a43
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an external URI pointing to 'trafffe.ru', which is likely a malicious domain used to host phishing content or further malware. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

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://trafffe.ru/123?utm_term=hobby+lobby+dollhouse+lights PDF link annotation
    • https://cdn.sqhk.co/sakiforivona/B8ighaA/tewebisepune.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368788/normal_5fdee0409c2c4.pdfIn PDF document text
    • https://cdn.sqhk.co/loboremetoxe/jbheQhg/vopudetavisol.pdfIn PDF document text
    • https://cdn.sqhk.co/pifixijowoka/WifEhh6/online_grocery_shopping_walmart_application.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/Ipogdie/jolly_phonics_lessons_app.pdfIn PDF document text
    • https://cdn.sqhk.co/xasexuwosul/Hjaidgd/paper_racing_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/milatepoz/ggfFShf/king_balloon_nadeem_lahore.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470982/normal_5fa7860966502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370092/normal_5fc596ff90156.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386094/normal_5fd08f8538bf8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b119ff8-7ff5-4c9b-bd0c-50566d8a9c14/97567177394.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d068ba7-b903-4893-8d2b-18a9817fc085/jamaica_radio_rjr.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3f1cb4-d7b6-4746-b4d1-aebcd2efe5c4/sakumidujosevoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a102fc3a-1f42-4530-83a6-2f2f90618599/sling_tv_android_app_download.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_off0000ceae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAE 4984 bytes
SHA-256: e8315c2202936828a75b7d86196866911c015e4a5713d386771ab4c41035c1d9
font_01_sfnt_off0000dfa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA0 10476 bytes
SHA-256: 945bbbce40e943e21127a00cd8c8c08125be72ee1ec7fcca57ca25aa7646b1c2

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