Malicious PDF — malware analysis report

Static analysis result for SHA-256 70a24fd44c1977b0…

MALICIOUS

PDF

74.5 KB Created: 2021-07-14 05:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54913a15f20e749b62641fe0916d7055 SHA-1: 8352a1d861444885b36b7d41ab6850992caa572b SHA-256: 70a24fd44c1977b052c4daccac920aaa1667a43b8362336899b98fff75af97ce
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to 'archism.ru', which is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve a second-stage payload. No scripts were extracted, but the presence of an external URI in a malicious PDF suggests an attempt to redirect the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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://archism.ru/square?utm_term=how+do+you+say+pizza+in+spanish
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee0bf67d49fb55d6236673/1626213366938/zoxitudikifomurutomov.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec7727c268f363b085828f/1626109735282/download_battle_of_warship_mod_unlocked_all_ship.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee3ba72d09e34b72a02447/1626225575312/1989308466.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed989737bfc37e3c22cf2c/1626183832129/smmes_in_south_africa.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee2ce25f7927514e3bff53/1626221794383/desperate_housewives_s4_e9.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_off0000c27b.bin
039a5af3168ecadabac54bbbd72e6a65680e5305bccd3c06a0b2de2a79b43b5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC27B 10464 bytes
font_01_sfnt_off0000da2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2B 16792 bytes
font_02_sfnt_off0000f23d.bin
3a0300a2826e06833768173074aec4bb473b41da61fa93b76b7139482fa23d7a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF23D 16984 bytes

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