Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3162c502a428fb…

MALICIOUS

PDF

133.9 KB Created: 2021-07-13 16:47:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cdc3e69debf0858f4ce6a75c5a135f8 SHA-1: 65e099d8422e5b5d858110199254d3f1006254b7 SHA-256: fe3162c502a428fb487620e8d762ba2683985e9b1b56057f25d8297419f0ac3a
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. 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 external URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3903

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://inwebjor.ru/square?utm_term=iso+7045+din+equivalent
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7ba8f6e46386ca3becfb2/1625799311435/download_gameloop_for_call_of_duty.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eccea09f88ea4de3338ad9/1626132128823/vebafodaxakawor.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e82ec8a431ed42d2ff613d/1625829064676/calculus_for_dummies_free_download.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_off0001aa7a.bin
b963077bde13cf4202a2b127488c64847174d11b5930a22f491d879677ba8636		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA7A 17924 bytes
font_01_sfnt_off0001d911.bin
11e9fa9b9c9851bb373c744145d1efb36bb8077fdf39d562fa777cd2a12e580c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D911 10788 bytes
font_02_sfnt_off0001f1fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1FC 16792 bytes

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