Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8b167ece687f057…

MALICIOUS

PDF

81.0 KB Created: 2021-07-14 06:39:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 967c63be253c9e43cd9f8a7fb1342ba7 SHA-1: 15c7ca902a1aae0c4029f764669596a995163cce SHA-256: b8b167ece687f0577623d22f4fd7aff38ff08f0c074fe8f2ab53d8d37e6df33f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL. While the URL itself is marked as benign, the presence of an embedded URI and the ML classifier flagging it as malicious suggest an attempt to redirect the user to a potentially harmful site. The ClamAV detection further supports its malicious nature, likely as a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9031

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/~3/7R6buoffwiA/square?utm_term=in+the+heat+of+the+night+season+2+episode+13
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee2211e9cbfe6c2fe60336/1626219025387/before_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecad47e0784948549c71b7/1626123591776/clydes_wine_and_dine.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec7de16ad76c09748f9eca/1626111458031/paxizid.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee41ae796bb0196c61fc7c/1626227119027/how_to_remove_password_in_mobile.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec91963631fd4ab81745af/1626116502718/lotewutowa.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee1602b1dcdf258da4e08b/1626215938915/all_about_tunisia.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca6d3e7718717d7654a5d/1626121939553/22640932624.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_off0000da73.bin
3e2b7c0270eff4c010824570e63e69e4e59e9346e2c2ca977b0f1dd58920d5d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA73 10928 bytes
font_01_sfnt_off0000f397.bin
2d362993a9fe00f36b01f90b818cfae6894a11e4d1067ab77f5c47d66c2cc0d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 16952 bytes
font_02_sfnt_off00011f9d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F9D 16792 bytes

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