Malicious PDF — malware analysis report

Static analysis result for SHA-256 e201360619271099…

MALICIOUS

PDF

81.7 KB Created: 2021-07-16 15:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0dfeb35a2dc6ed29e55a9493b8d485c2 SHA-1: 3467469c6fe6e8fa169d6fe33a321583ce4cf8ae SHA-256: e20136061927109963435c6d61170b583c48723d574b0521239002d282dd7de0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains an embedded URL that redirects to a suspicious domain, disguised as a search result for academic material. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to a malicious site, likely for credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.1658

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://infrive.ru/square?utm_term=hamiltonian+mechanics+problems+and+solutions+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93a11b132fa36207454c5/1625897490456/fail_to_authenticate_from_external_provider_pubg_2020.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f12a8715846f0d14eb2301/1626417799744/lifeboat_ethics_questions_and_answers.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_off0000d9ac.bin
3830b8b9eba95c550c0ae7dccfe914847d76adbd3148a0f4f6ae3e37348daf7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9AC 11116 bytes
font_01_sfnt_off0000f317.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF317 16792 bytes
font_02_sfnt_off00010b29.bin
c1ba311ec3f79211ffdc5a3eebd74c7e19e1729989574a93a545c5b9a7c1b8d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 17348 bytes

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