Malicious PDF — malware analysis report

Static analysis result for SHA-256 8887d62c340cee02…

MALICIOUS

PDF

97.0 KB Created: 2021-07-15 22:39:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5fbe2c0056b5409ec5ea7ad773fc90e2 SHA-1: 4a903850a9b4c89302d7a57ea9c098de4418830e SHA-256: 8887d62c340cee0278b3a694d4ae123013e76bcb17a64a6ada0fee7e885499a4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing purposes. ClamAV detection and ML classification indicate malicious intent. The document body is heavily obfuscated, but the presence of an external URI and the overall classification suggest a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5653

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://chcial.ru/square?utm_term=ups+shippers+letter+of+instruction+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed87e3c1f2f61945a4fb15/1626179555481/25713908394.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8edd73b7e7c63344da7a3/1625877975779/70428973218.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec86125978cb5ccaab1280/1626113554308/rikiba.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed700df95b5524f9535a21/1626173453538/information_processing_theorists.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7a92c4454ab0ddd833804/1625794860406/xidasadefag.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_off00010398.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10398 16792 bytes
font_01_sfnt_off00011baf.bin
46eff3cad988f9a0e93c564f77a29b3304e362f3082c33b3871e99489ce96aaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAF 10660 bytes
font_02_sfnt_off00013409.bin
00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13409 16140 bytes
font_03_sfnt_off00014981.bin
982a51994220f0a4518d00816633894f8086e1f64de5ec50a17fa45e5dbbc90d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14981 17016 bytes

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