Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f86e8a7cce8681…

MALICIOUS

PDF

72.9 KB Created: 2021-02-01 12:45:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4eef02995fbbeb51837eddaf2d3ecd05 SHA-1: 58e3e002a72e00a57d23f5fc7c24fa06b93415aa SHA-256: c0f86e8a7cce86818c4866b0962425b2f16d5d336f820c88678bcb9e2d50c839
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, suggesting a phishing or malware delivery attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI point towards a common phishing lure technique.

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=gurps+4e+basic+set+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4459182/normal_5fe2f6703937a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422137/normal_60035f553cd86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473388/normal_5ff97348eb1c9.pdfIn PDF document text
    • http://gupozatu.22web.org/underactive_thyroid_nice_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407301/normal_5fef0c22d427f.pdfIn PDF document text
    • http://faceit.su/saddleback_basic_english_grammar_book_1_answer_keyu7oek.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/gxheCC5/jebudojebevuxuvefifewobe.pdfIn PDF document text
    • http://kanshoper.site/86041168406cqf9h.pdfIn PDF document text
    • http://cosmeteca.com/488739563447y27x.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387582/normal_5ffe985236409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417221/normal_5fcd9aa3edf76.pdfIn PDF document text
    • https://cdn.sqhk.co/timadupak/tUgdaki/11152510119.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lebiwubeso.rf.gd/lesunupefizisuzeloxilafu.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/xuladokason.pdfIn PDF document text
    • http://digifasofow.rf.gd/vowezibasoviguwidamufuku.pdfIn PDF document text
    • http://fojoxolizono.rf.gd/pengertian_adversity_quotient.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/dabomazagobetid.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/bosch_automotive_handbook_5th_edition.pdfIn PDF document text
    • http://zumebixakefeta.epizy.com/luceplan_blow_installation_guide.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_off0000dfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA3 5376 bytes
SHA-256: 7bc3070f250f2d0c7ce3b30743f1fa57600a65c2486a24861e4d0e1559fcf322
font_01_sfnt_off0000f1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FC 10636 bytes
SHA-256: ff431f3cf6716c0b1ddcc9318b6a83aace12c7a488155920c2c0d88d4325a88c

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