Malicious PDF — malware analysis report

Static analysis result for SHA-256 da052748cf321080…

MALICIOUS

PDF

69.6 KB Created: 2020-11-19 00:52:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ab58d7607e83a278f97141fa46a02e31 SHA-1: b148364bc2cec88ef7f22e444eda03b73de5d8da SHA-256: da052748cf321080a0b9d5ce65d541fe5a848116efe6aba8db3203c54d1c8aea
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/123?utm_term=xcom+enemy+within+guide'. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://cctraff.ru/123?utm_term=xcom+enemy+within+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382190/normal_5f8cf5ab4055d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f88f3ab90694.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384035/normal_5f94894a3be8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f90e31eb1e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445532/normal_5fa887e7bcde3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5fb5a44f631d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373511/normal_5fa3d648d1795.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5f93b1c8f0865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5fa94290329c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/22800db9-8915-481f-9e3c-fc22ba22c1fb/76023687796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30ca7430-f3aa-4d7c-87c5-f0c1f670ddf1/the_lord_of_the_rings_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/potevip/milaca_unclaimed_freight_facebook.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_off0000d651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD651 5008 bytes
SHA-256: c32ae2e262e9481c6b686964d6c316dbebd73d04908bb8182b1e6ebe0113e361
font_01_sfnt_off0000e751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE751 10192 bytes
SHA-256: 52d5a87a9d9167991ed69a45e66b5f671882c672093b7edb984d4d5c37e0f17c

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