Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04d6c40ab60e95e…

MALICIOUS

PDF

66.5 KB Created: 2020-12-17 18:40:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5ec5b7cec2e84381abd46ddd3ee2c4ee SHA-1: ba0e218fab6b31c9073de952ad0a4f73a0768bf3 SHA-256: c04d6c40ab60e95e7b3b45ef0df9ea401ecfbfe97ef3d251771e2c6d41d6453b
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution lure. The presence of a large number of embedded links, including one pointing to known malicious redirector infrastructure, strongly suggests an attempt to redirect users to harmful websites. The document's structure and content, despite being heavily obfuscated, align with typical phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gettraff.ru/strik?utm_term=dear+sir%252Fmadam+gender+neutral In PDF document text
    • https://vumifedesonuzik.weebly.com/uploads/1/3/4/8/134849268/7abb3d97beb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501206/normal_5fbedd192580a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5fa50c30c40cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5fb2a10b4c6e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447086/normal_5fc26d88be408.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465400/normal_5fc311f68aaa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424024/normal_5fc12e5cb03d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_5fa705f4d896b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_5fafd309c3513.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/5fbce344be7cfc36344e8aaf/t/5fbd16075e198d0a3863b27a/1606227464221/jelitimejirabijef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f485cd1e280355d49316/t/5fc58f2ceaf37e3b645b3560/1606782765028/rusoberorapuxelef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44bdc0bc-ac58-4014-ac4e-695865ef469c/4171836587.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_off0000c868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC868 5180 bytes
SHA-256: 160759a4a7f2a58baa8cd65fdb79d70988cbd3e486e33ebb69eb4a66580b527d
font_01_sfnt_off0000d9fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FA 10420 bytes
SHA-256: 90ad077759c4bbb50d0505bc13e0a83998e6f846426a76ddceb0cd3e7f1a8955

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