Malicious PDF — malware analysis report

Static analysis result for SHA-256 2de76b3e9b58f009…

MALICIOUS

PDF

76.2 KB Created: 2021-01-13 15:12:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 220229e5fbf0624db67fc380f51f8e60 SHA-1: d9b9eabd587b8b933841ded09d6ff4ff0b0187d2 SHA-256: 2de76b3e9b58f0096f87f4f1380e2016b4702b537090c05c34a3bba75cd1fbc0
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. The PDF structure itself appears to be intentionally malformed, contributing to its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/aws?utm_term=molecular+biophysics+structures+in+motion+pdf PDF link annotation
    • https://cdn.sqhk.co/jabosuve/hcjcicp/59641640462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_5fb894ea5aa2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377674/normal_5ff9ae9290486.pdfIn PDF document text
    • https://cdn.sqhk.co/doxowite/e8ieVhe/24230781348.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496193/normal_5ffbd93cbeb89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475194/normal_5fe9cdbda3764.pdfIn PDF document text
    • https://cdn.sqhk.co/vivepovugeli/agjLKgc/wixuzixu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453764/normal_5f9fc0d18b90d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484631/normal_5fc3ae756bfe1.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/nefomojuwet/access_bars_livre.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_off0000ec43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 5644 bytes
SHA-256: 44935206d12f5113a2d21a36a0dc925d5e5fa0b94c69ad82d967e0c2aeb33d09
font_01_sfnt_off0000ff55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF55 10788 bytes
SHA-256: 1f00cefb835d567aae97db94ab45b09646307e2fd6d78a8faff62fec27cb08af

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