Malicious PDF — malware analysis report

Static analysis result for SHA-256 d670a75e39b240ad…

MALICIOUS

PDF

81.3 KB Created: 2021-07-14 02:38:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e3ec05d2bb689ef26f86f009fff6a113 SHA-1: 8235bd4f7f6b38b85725bc55cb336af1d034ffb7 SHA-256: d670a75e39b240ad85048f1782d7602d1e4cc3ecb15c73fe72df541094fa8e9b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it's a phishing trojan. A suspicious URL, 'https://irlanc.ru/square?utm_term=yugioh+tag+force+5+cheats+ppsspp', was extracted and flagged as potentially malicious. The PDF structure contains embedded URIs, suggesting an attempt to redirect the user to this external resource. No scripts were extracted, but the overall pattern points to a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3546

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://irlanc.ru/square?utm_term=yugioh+tag+force+5+cheats+ppsspp
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed9818e0c6fb606613619c/1626183704197/lolozo.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec910eb3b63f0898f2fd15/1626116366832/neet_pg_previous_year_question_papers.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec855f8300fd66e196797c/1626113375981/have_in_present_perfect_continuous.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e85b2db3ee685ae3379bb4/1625840429546/what_does_mp_stand_for_in_games.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf4d.bin
a7e89baaf7bfc791e5e8dd6575b2773487718df8e44a5f9a45a0a365770af243		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF4D 16936 bytes
font_01_sfnt_off0000fba1.bin
dcec148d6180a9ec1a0a8d42175632c65c34d0fe368f7c04b56c06fb639ae558		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 10824 bytes
font_02_sfnt_off000114cc.bin
8865a5d1c2db42771f9731092624fefe367954e1480d810c1fa3e4bc0ffa0c6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114CC 2296 bytes
font_03_sfnt_off00011f04.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F04 16792 bytes

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