Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c6365aab6d1430…

MALICIOUS

PDF

72.0 KB Created: 2021-01-05 05:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 27b595301d16b52308df85c2ceeda3e5 SHA-1: 76312b9400fc14cc89df0b6a2ce12e921b9d8a50 SHA-256: a1c6365aab6d14304ebc0db73d1e79af25e2b983190b9556a89d310a0bd542cd
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document's metadata suggests it was generated by wkhtmltopdf, and the presence of embedded URIs and the overall detection score strongly suggest a phishing lure.

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://trafffi.ru/aws?utm_term=dangerous+goods+note+template PDF link annotation
    • https://cdn.sqhk.co/guzunilepin/d72ih9d/jutiti.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/503gigf/battleground_survival_mod_apk_unlimited_money.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/vomowupek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca860559-c976-439c-b12d-04bf24070a1a/nawijenarepetegogiwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/jibudomuduzapodoruxewuv.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/best_podcast_software_android.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/19089418628.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/86212923305.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/application_letter_for_volunteer_work_in_hospital.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/90189783095.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/53031721365.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/52272579638.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d83bf2cc-510b-4102-be96-0549518ca427/zebra_zp_450_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/tesotiwapax/jobujunawolapil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc1b7a02-679d-4ced-a465-3a89cf569712/zoziwi.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/mega_filmes_hd_apk_2._0.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_off0000dcf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF8 5280 bytes
SHA-256: 609430950f3572d42407bcd7bdb3c87d898bb5b0b5526ee6ffe05d7cddd532b4
font_01_sfnt_off0000eedc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDC 10588 bytes
SHA-256: 256e11e66a5ea81febe25d6f44b37cc49d132f11d2282fdbdd98e36035e7af58

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