Malicious PDF — malware analysis report

Static analysis result for SHA-256 539b37e0438bc2fa…

MALICIOUS

PDF

71.6 KB Created: 2021-02-26 13:01:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 121eda2b13935ad5d219e3600fa0f0d8 SHA-1: fe96eb8c2508638f4002d5fc1d3dae68dc5d03fc SHA-256: 539b37e0438bc2fa04a4a63107b7a6ffb0a42f6bd98f3bc57fffdaf6556bb711
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious resource, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/strik?utm_term=how+many+red+number+cards+in+a+deck PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482189/normal_5fe7809b2211d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457577/normal_5ffa9cba527c5.pdfIn PDF document text
    • http://viwimewi.22web.org/visofevikulifatilezelo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380384/normal_6007f07e90376.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424361/normal_5fcf3c00ea04d.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/Iggijig/icing_on_the_cake_meaning_in_tamil.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392210/normal_601fef5208767.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/kiwukixawasa.pdfIn PDF document text
    • https://cdn.sqhk.co/develezuwa/thbKgjE/matrixyl_peptide_serum.pdfIn PDF document text
    • http://mudelukise.iblogger.org/xegemirebo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC35 5412 bytes
SHA-256: d9a8b234a14eec3d9d043e2cc5c975f2d646fcbea7596d148c7dba3b8f2b63e2
font_01_sfnt_off0000ee98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE98 10440 bytes
SHA-256: 10ab9dab4e26b8b9540d8c9128e202ad4ef2525bf71df27fc61a5f88df1cc24c

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