Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc5ab68a91e350bb…

MALICIOUS

PDF

76.8 KB Created: 2021-07-12 22:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aaba731820a4cf10245bd2e3bb4c6078 SHA-1: 80ff878b1146cbb321cb42e8da5531ebe0dfa46c SHA-256: bc5ab68a91e350bb19faee4273ef2dd382b733995f06671acc1309d3f1903097
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing an embedded URL that leads to a suspicious domain. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. The embedded URL, disguised with a movie-related query parameter, is the primary indicator of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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://pistant.ru/square?utm_term=birds+of+prey+and+the+fantabulous+emancipation+of+one+harley+quinn+cast
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7721fe047727940a50b6/1626109729341/mustang_mt82_transmission_problems.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8468c3fb560d26f2f9d0/1626113128556/how_to_get_easy_anti_cheat_for_fortnite.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7a6d950202184f0f8b0a/1626110573977/60094644545.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8ec390a3fc49531a1cbb/1626115779421/47827466787.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7ee.bin
71608b5238cf2436137177a0c6d6a130cc98db53ad1ab8e68802ba24f2aa64f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC7EE 11440 bytes
font_01_sfnt_off0000e259.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE259 16792 bytes
font_02_sfnt_off0000fa6b.bin
1f9f1a2acd4b32e4b83ee433d4380ecb0269186ba31aaa4c1662a9eb378e40e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 17168 bytes

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