Malicious PDF — malware analysis report

Static analysis result for SHA-256 289c4286f020d3b5…

MALICIOUS

PDF

72.9 KB Created: 2021-07-17 11:34:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16ced6e553e4088104466df850df09bf SHA-1: 6f8bb6701a453396f4d8aef38c2a38049a4b707d SHA-256: 289c4286f020d3b56e5b113e5580fa3cf8a59495e397ea1718f61d3418661530
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan signature. It contains embedded URLs that, while some are marked as benign, suggest a phishing or malicious redirection attempt. The PDF structure and embedded content, though heavily obfuscated, indicate an attempt to exploit user interaction through links.

Machine Learning

  • Nyx PDF Classifier clean score 0.1651

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://feedproxy.google.com/~r/razvivatel/yapz/~3/UkUWPC8UKDU/square?utm_term=ml+emote+injector
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e92511defa333328aa9ffb/1625892113080/gripping_gaap_graded_questions_2019.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0f0060a71fd0da9aaaffb/1626402822886/nufarig.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_off0000c0d3.bin
43aef5cfbcd5018ed04e190a1847dc63f30cf356a2dbdd64772df025080a9034		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0D3 10184 bytes
font_01_sfnt_off0000d782.bin
37aa413bcd4c0f514157bcab7fcfaacbda4ff2bfa7f3f61327e6563932f7554f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD782 15396 bytes
font_02_sfnt_off0000feba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBA 16792 bytes

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