Malicious PDF — malware analysis report

Static analysis result for SHA-256 86742efc22134a46…

MALICIOUS

PDF

71.8 KB Created: 2021-07-20 00:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 273fbba2c6f6faac3da34eaa0bb9ce2f SHA-1: 6d7f611535cfcf3248aea242dbab1fe84e46d850 SHA-256: 86742efc22134a46ac8989060809a73a6af6aad26c8202ce06158d8d8e587be0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, even those confirmed as benign, suggests a potential for malicious redirection. The PDF structure itself is complex, with duplicate object bodies, which can be used to obfuscate malicious content. No scripts were extracted, but the overall structure and detection indicate a phishing or malware delivery attempt.

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/pL_UGxDroB4/square?utm_term=farming+and+irrigation
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee512c0b33b63bb8c75425/1626231084264/new_fallout_game.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f179f85142327a87453ba9/1626438136559/60493029444.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_off0000bbef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBEF 16792 bytes
font_01_sfnt_off0000d401.bin
973bf681af8fbfea6e4a2fabfd261149d369a7a8462ee165f2daa5e46723e0c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD401 15504 bytes
font_02_sfnt_off0000fb8a.bin
648db9e14df898d2a40f2925aaf47e8eeedea51590dd00e79e613f906ed09501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB8A 10224 bytes

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