Malicious PDF — malware analysis report

Static analysis result for SHA-256 40cc62189c46c803…

MALICIOUS

PDF

77.0 KB Created: 2021-07-14 05:58:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0d3372a2d41c6a02b8dcfb1e603030c2 SHA-1: 0742626dbe97d9e730c9e82469d11c6b7cb75fb4 SHA-256: 40cc62189c46c803aec7d476f62f1851d02c7fc533f2998f84089d7aa7aac88c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as malicious and an ML classifier also indicated a high probability of maliciousness. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the presence of an external URI indicates an attempt to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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://catamma.ru/square?utm_term=old+christian+devotional+songs+malayalam+mp3
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d2a63bde986563e493f1/1625871014242/sessile_leaf_example.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed1614e255175820bd202c/1626150421064/sixelatatobujamusuve.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a07a7d3b385c94b2777e/1625792634925/nuxunugovagazefagiluwag.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7d45eba333063f1781cd1/1625805918201/wozipijafixan.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee3aa8df3d323292d04862/1626225320546/lazositozuvuniwawepivekag.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e80693d56f0f361272d578/1625818771868/the_greatest_prime_factor_of_1000.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d54c54da9c6696c5ae80/1625871692970/should_i_workout_on_an_empty_stomach.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee155b2485902f3e70401c/1626215771325/gasurufebarakofogasebutot.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_off0000ca48.bin
228a14b0e5681576fa2eb6fc45664cb6f8385d2058e0f3d8f4125ca64325c3b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA48 16500 bytes
font_01_sfnt_off0000f53c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53C 16792 bytes
font_02_sfnt_off00010d53.bin
2b5c9be9568aa482fdea29ad1311a858e8e5a0b2c1db4406ebad9afeab521d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D53 11336 bytes

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