Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b737e5b47db269b…

MALICIOUS

PDF

75.6 KB Created: 2020-11-20 07:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a254489b46b102d9bd67b490421433af SHA-1: 1441b1de39116a9832118c8f8156af7cfcdd7015 SHA-256: 7b737e5b47db269b0abd7a9e2b61c5da6fdc979c9758dfd6f51149edc92fd24e
154 Risk Score

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=free+smite+codes+2020'. This URL is also listed as an embedded URL and is the primary indicator of malicious intent. The ML classifier and ClamAV detection further support the malicious nature of this PDF, suggesting it's a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=free+smite+codes+2020
    • https://cdn-cms.f-static.net/uploads/4366359/normal_5f8a73eca5733.pdf
    • https://cdn-cms.f-static.net/uploads/4422145/normal_5fa9cb925afe8.pdf
    • https://cdn-cms.f-static.net/uploads/4410004/normal_5fa16ce988014.pdf
    • https://jedufopev.weebly.com/uploads/1/3/4/4/134490540/5eae7b.pdf
    • https://cdn-cms.f-static.net/uploads/4384831/normal_5f9727b05fcc1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/dujepav/fujotebilusekiduzakas.pdf
    • https://s3.amazonaws.com/mubemutolewe/summary_of_beautiful_boy_book.pdf
    • https://s3.amazonaws.com/widuxade/hill_climb_racing_2_hack_ipa.pdf
    • https://s3.amazonaws.com/sojaxub/atomic_motorsports_bengaluru.pdf
    • https://s3.amazonaws.com/kakef/madden_mobile_apk_update.pdf
    • https://s3.amazonaws.com/febopa/57231094457.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecf9.bin
b92086258d18604a52214e7640616870ffbb57dc71e74a105e3affed4aa6c079		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECF9 5072 bytes
font_01_sfnt_off0000fe27.bin
cfec4032b97cfd8322c78d44578deb4613ba0303a38d985ba1d3a23b07caa344		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE27 10676 bytes

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