Malicious PDF — malware analysis report

Static analysis result for SHA-256 50a62f2a7e6b577e…

MALICIOUS

PDF

84.8 KB Created: 2021-07-15 12:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75f7fb05e4daa0c089bcd65c9ed7adef SHA-1: 3a45c29e62346b0ca9a8958a0e941690dcc1b56d SHA-256: 50a62f2a7e6b577ea0c0560c1ba196650962afa8fecb0cabaae2c9f5402cda1f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URI pointing to a suspicious external website, identified by ClamAV as Pdf.Phishing.Trojan. The embedded URL is likely intended to trick the user into visiting a phishing or malware distribution site. No scripts were extracted from this sample, but the presence of the malicious URL and the ClamAV detection strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4119

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://huntic.ru/square?utm_term=biceps+and+triceps+home+workout+with+dumbbells
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8bb6f1b22c82f862c5114/1625865071590/xejesoxavegevamobejes.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e933392dabf272355504e9/1625895738089/bawovelumesuzigeji.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e898058e6e246adebd9978/1625856005479/pub_quiz_questions_and_answers_australia.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7ba4a7d3b385c94b40833/1625799242202/what_does_cn_stand_for_in_texting.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_off0000d4bf.bin
072b990108428a66b0ec4e5868a340ef00b17445433acb3e800cf5920f42d4fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4BF 11248 bytes
font_01_sfnt_off0000eec9.bin
62a210e1238667892ecc3d7883e9cec142692f60b73afa0e2c3d62e6a439301e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC9 16236 bytes
font_02_sfnt_off000118d6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118D6 16792 bytes
font_03_sfnt_off000130e7.bin
72b6d5534888ecec27fd68dccf88827b5fbc3510db23809d90398b76a33fedee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130E7 16304 bytes

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