Malicious PDF — malware analysis report

Static analysis result for SHA-256 173ff727f7adffad…

MALICIOUS

PDF

71.3 KB Created: 2021-01-11 01:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6785657ace281ea31dbf1467024fc26b SHA-1: eac1b569eccd79122b7383cd935a929267fd16d4 SHA-256: 173ff727f7adffadd8447ce8ea5a585d156b3e5d815635dace09a7055445f5af
96 Risk Score

Malware Insights

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

The file was detected as malicious by a machine learning classifier and ClamAV, specifically identified as a phishing trojan. It contains an embedded URL pointing to 'trafftec.ru', which is likely intended to redirect the user to a phishing site. The PDF structure itself does not contain executable scripts, but the presence of an external URI and the nature of the detection suggest a phishing lure.

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://trafftec.ru/123?utm_term=5e+point+buy+costs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487631/normal_5fbe3377af664.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470821/normal_5fb8445c9daa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470545/normal_5fb91cea511e3.pdfIn PDF document text
    • https://nuzefamulazoxiz.weebly.com/uploads/1/3/4/5/134582777/punov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463538/normal_5fd8d13f861fd.pdfIn PDF document text
    • https://tuboxivodase.weebly.com/uploads/1/3/4/3/134387713/4725217.pdfIn PDF document text
    • https://waxojokizubow.weebly.com/uploads/1/3/4/4/134482073/zotidilovo.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/2511032.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444649/normal_5fd6449d168e9.pdfIn PDF document text
    • https://kexejimeso.weebly.com/uploads/1/3/4/0/134096016/kinimavijonuzut.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_off0000dc58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC58 4860 bytes
SHA-256: 794679cd0863eae91a909e28b8077fc5bd28a7f8f32656f0fa5195864106adf8
font_01_sfnt_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 10656 bytes
SHA-256: 9d389be8c24d0dafc47e5861029b2093e49fd6ed8114da7789769d2cd1eb41b5

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