Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfebb271317587a…

MALICIOUS

PDF

135.5 KB Created: 2021-07-15 10:00:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 687cdb5cdbc5fb2ecd0e9de416cea0b9 SHA-1: 8ed0dc5d25094c3051135141d94b17154d32fd87 SHA-256: cdfebb271317587a0b3dcfd685a32323d5f8f8dc20d0976ad3e02890b262b093
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. While the document body is heavily obfuscated and unreadable, the presence of multiple embedded URLs suggests an attempt to redirect users to malicious content. No scripts were extracted from this sample, limiting further analysis of its specific behavior.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4732

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/gOBB6uaVNRA/square?utm_term=twilight+breaking+dawn+part+2+jacob+and+renesmee
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed89971c817c33f6d82894/1626179991377/helices_and_sheets.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e940b75ebba154a8fd5212/1625899191650/gibotonaji.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efdae1bae8d04216d43071/1626331873524/xasozikazebukur.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edec39172ba47bdac53925/1626205241298/mustang_build_and_price.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8f24c025aa46e30d0b528/1625879116834/logufisuximoxubodu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e78ca8d93aeb546a0fcdd0/1625787560676/87953067071.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_off0001ac6b.bin
9a403c09e53922e52c1216b7b8b6965f62b5d64e6180bb8a0028c4b01da3b091		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC6B 18524 bytes
font_01_sfnt_off0001dcd7.bin
4da7d400eea83f322194a687e8cb6ed0cb8497b19f087d0b78f88d9db14c35c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCD7 11492 bytes
font_02_sfnt_off0001f77d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F77D 16792 bytes

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