Malicious PDF — malware analysis report

Static analysis result for SHA-256 5438c309d4048a17…

MALICIOUS

PDF

78.4 KB Created: 2021-07-15 11:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 964f1729bf2f8bcb98c0ea9d656a720b SHA-1: fe739713b7f2715c53fb1448a302ecd259e523fd SHA-256: 5438c309d4048a17129949014f162e7b5a3a636b06c05101585fa32aa09ca1f4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL. The ML classifier and ClamAV detection indicate maliciousness, specifically phishing. The embedded URL, disguised as a link to game cheats, likely leads to a malicious site designed to steal user credentials or deliver further malware. No scripts were extracted from this sample, limiting the analysis of its execution behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6612

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://feedproxy.google.com/~r/sq/ugae/~3/4Ji06Fp1PxY/square?utm_term=call+of+duty+mobile+cheats+android
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec88b67e2b6271615bef64/1626114230874/fijuwodabotemumopodebed.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edadbe7d02012a3633858b/1626189246201/93023915031.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee1024df274736e0a81015/1626214436118/64359243100.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee35555f7927514e3c8e79/1626223957655/33179338426.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_off0000cf06.bin
d4f314870c893275bdf075c6d92c5678cdc903c3780e329e7a4962e916981898		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF06 11128 bytes
font_01_sfnt_off0000e8db.bin
e9760645c394b5304327710a1c8db772c87d6698964ed7803c8f2fb811b4f119		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DB 16652 bytes
font_02_sfnt_off00011402.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11402 16792 bytes

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