Malicious PDF — malware analysis report

Static analysis result for SHA-256 a347d024f5b7d2a9…

MALICIOUS

PDF

82.3 KB Created: 2021-07-13 04:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ea2c23bbeae688890180ce8b5a89ca7 SHA-1: 8d976e1f858cd3a22f70cac7a028a994e306cde4 SHA-256: a347d024f5b7d2a9dd19bedd5bf73c3b753482e7a972c0a2dae401e5fa1b83ab
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The presence of an external URI suggests an attempt to redirect the user to a potentially harmful website, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crewmak.ru/square?utm_term=optical+illusion+puzzles+with+answers
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e93a11b132fa36207454c5/1625897490456/fail_to_authenticate_from_external_provider_pubg_2020.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8e65812fb7d0b2790536c/1625876056094/lake_near_squaw_valley.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca6cd704a383bbedcf3ba/1626121933182/78197109111.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_off0000e104.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE104 16792 bytes
font_01_sfnt_off0000f916.bin
7fd664ab31be103017670a2569b2e388b066554dc43aab51f374f67fcd171409		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF916 16708 bytes
font_02_sfnt_off00012498.bin
0ee4075367f4a39bae453fcd4faee3a766b2c6f1c5dee176b19b678c7240aaa5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12498 10744 bytes

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