Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8c19de2d6ed8c3…

MALICIOUS

PDF

82.3 KB Created: 2021-07-20 13:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d58d69d33975eb6fda5877a7ee46d4e7 SHA-1: da9f9e5398a35e4a0c55198d0ca7ff08fda67e28 SHA-256: 8f8c19de2d6ed8c383ae02329d142e27ac920e4a931f5df98d178e29d8db715f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV, specifically as a phishing trojan. It contains an embedded URI pointing to 'https://chcial.ru/square?utm_term=fast+and+furious+i+live+my+life', which is likely a phishing lure. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not a typical user-facing document but rather a container for malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3546

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=fast+and+furious+i+live+my+life
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edc630a4137771baff4442/1626195504909/colour_blindness_is_an_example_of.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecb0e4ad57c82336578b5c/1626124516604/kagifivisaloverodaw.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f4596129712869f071395f/1626626401748/how_world_was_formed.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8a7614b0a8d5efe5a4438/1625859937541/botutixojagugagoxorinok.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
stream_004_off00010ca0.bin
9229bde5e3614c940ebb387a6affb910e6b09cdb82f6b0ab59768fbd23138caf		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10CA0 16244 bytes
font_00_sfnt_off0000bd07.bin
533023a6053b9bcc7e686ea6ad7730f48a08f9fdba53d773497b35c4a7ae75b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD07 21508 bytes
font_01_sfnt_off0000f3d3.bin
2d9ecab037353e77e2c0486da718c03b3c4111f72a0474642e2633a57934efb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D3 10772 bytes
font_03_sfnt_off00012290.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12290 16792 bytes

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