Malicious PDF — malware analysis report

Static analysis result for SHA-256 7052a38e75ee8425…

MALICIOUS

PDF

72.6 KB Created: 2021-07-13 18:41:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9bbab0dff77111680c801b0207c3d62d SHA-1: 8c5144219e8a661f710c10ade749e9f79fb56344 SHA-256: 7052a38e75ee84256dbe6c04ea177ac7008cf954533d59e7e7da525fe173c1c1
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, 'crysiq.ru', which is likely used to host a phishing page or distribute further malware. No scripts were extracted, but the presence of the malicious URL and the overall detection indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6426

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://crysiq.ru/square?utm_term=what+should+i+put+on+desired+salary
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed8fa664a4563c8f7f4652/1626181542503/french_and_indian_war_lesson_plan.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed99a77daf0c15b068d53d/1626184103286/free_printable_collage_maker.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ed538915684aa53ab9c0/1625877843379/701902775.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_off0000bce3.bin
bfd8da2c3b5983fb1e754213d0b8921bc7b3f249a9341af8ee8a65e4b195c2c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE3 15404 bytes
font_01_sfnt_off0000e43a.bin
7666539e3acaaa7dbff5c1c69f1d05db97876c12dcf582e98e1681cf4ac10726		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE43A 10696 bytes
font_02_sfnt_off0000fcc4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC4 16792 bytes

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