Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf6cce81cae4330…

MALICIOUS

PDF

102.6 KB Created: 2021-07-14 09:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13aa56535a24046e85a1e769c6c7200a SHA-1: a37b27b2b2771de7eca834ac15e0e659088a2e81 SHA-256: 4cf6cce81cae4330f4472d408de5d4185301788c1218f5a5bc073159eef97112
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7738

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://laborke.ru/square?utm_term=example+of+a+hasty+generalization+fallacy
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edefd12e8a4a2aca7be8e9/1626206161610/10_year_gsec.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8c19ae1e3555a3245e617/1625866650743/naruto_psp_iso_download.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c6d96e46386ca3bf95a6/1625802457422/fate_extella_link_mobile_apk.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ece0f7f67381323ef04848/1626136824149/pharmaceutical_care_process.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec87aa5f604029b991ed9d/1626113962728/73178773651.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_off0001309b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1309B 16792 bytes
font_01_sfnt_off000148b2.bin
691c48e72f6242411844e90b79c3b43fc91ac57cd94bd4ea583437ee9f377c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x148B2 11184 bytes
font_02_sfnt_off000162c5.bin
460370d88a019af61b16428255a1b87f8f331aae69b459809ad8cc83d1012087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x162C5 16356 bytes

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