Malicious PDF — malware analysis report

Static analysis result for SHA-256 517a0480969205e0…

MALICIOUS

PDF

65.8 KB Created: 2020-12-17 07:56:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a3feb8186428771e528b266eefd9d2a2 SHA-1: e3f14e1aa4f63bf7d14bd8f1539344f165ea1255 SHA-256: 517a0480969205e0a8dee81702230ffba9b0bd63a74d844a98ae9f86a2406db2
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffe.ru', which is likely used to host a phishing page or download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of the external URI strongly suggests a phishing or malware distribution attempt.

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://trafffe.ru/strik?utm_term=de+solv+it+home+depot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452199/normal_5fad69d61074d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5f8d0e598bd60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370265/normal_5f88fc8ac656c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5fb7023280d4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367925/normal_5f8815368565f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476582/normal_5fd281d109af8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403143/normal_5f95000be4d18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_5fbee9c849b1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481522/normal_5fad56087ff85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452381/normal_5fcc16f4e394f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387417/normal_5fa4c87f434b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483081/normal_5fc571cbec01d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1a551b8467722f1d988e0/t/5fc4be4a18e72e5fdb6de35f/1606729290989/72031809996.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_off0000c453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC453 4952 bytes
SHA-256: bf0346d87c62088a130b229b56296c8e98a7f14dad1e577fca6e4f9e682c407c
font_01_sfnt_off0000d512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD512 11068 bytes
SHA-256: 417d3aa09e7761d949d17737c40487e77523a57e6be2c29b1614f5861c11c9ee

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