Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d41ce15f6efd4b2…

MALICIOUS

PDF

77.7 KB Created: 2021-07-13 00:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b002bc3f8492f440142842227cb503eb SHA-1: e14614a577902e04a4066be08e731ac6b6e94e28 SHA-256: 2d41ce15f6efd4b2ff2361170d1853aba54b0230d3c84cfdb1c3c952491dd2e9
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 an embedded URL that, while currently flagged as benign, is indicative of a phishing attempt. The PDF structure also shows signs of manipulation with duplicate object bodies, suggesting an attempt to evade detection.

Machine Learning

  • Nyx PDF Classifier clean score 0.1551

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://feedproxy.google.com/~r/sq/ugae/~3/r_nBws6J8g8/square?utm_term=arabic+girl+names+with+h
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8ee0283ae0c4902369f7f/1625878018736/50158426554.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_off0000d246.bin
7ceaa0964e0cb3666cfe110924b98d9b0c7219dc3de7e9db87375880e8e75529		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD246 10764 bytes
font_01_sfnt_off0000eaf2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 16792 bytes
font_02_sfnt_off00010304.bin
18368b51a204480db259604d31fcc9074c4c5ed91f1bbd5c5ca73cbba09731bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10304 15848 bytes

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