Malicious PDF — malware analysis report

Static analysis result for SHA-256 80cb279bac51a1bc…

MALICIOUS

PDF

78.3 KB Created: 2021-07-13 22:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 263a4771e5bb2bfaee61bb099c5e9a10 SHA-1: c75c54a0404ebfe1005abb769954bfe00e3af205 SHA-256: 80cb279bac51a1bcc8f873827aed355869ab85e9e2566c6a6b370e133ff5c07b
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 embedded URLs and the ClamAV detection strongly suggest a malicious intent, likely phishing or malware delivery. No scripts were extracted, so the specific execution method is unclear, but the overall pattern points to a malicious document.

Machine Learning

  • Nyx PDF Classifier clean score 0.1551

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/sq/ugae/~3/HbdJGeoIq_s/square?utm_term=75+pounds+in+rands
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e945a9b68d8f0f4bf97083/1625900457801/user_interface_prototyping.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_off0000d14f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD14F 16792 bytes
font_01_sfnt_off0000e961.bin
5472cbcee0344e47bf1a21fbb623244565820d120be4923c7c8bd608b1c9ad28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE961 17216 bytes
font_02_sfnt_off00011654.bin
081527d6b449c0aa00d5bf13d9cfacb1133084d2f9257ef1eb9b54d99075f912		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11654 10296 bytes

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