Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b65cd23742ae12c…

MALICIOUS

PDF

77.2 KB Created: 2021-07-19 20:19:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb075f335ddeadd8ca3209d97ff08118 SHA-1: 2b9e2ab4d166579e9a46d5bb6ceea922b3159e0a SHA-256: 3b65cd23742ae12c88a30ab9933cc62f9504a2ef44260daba1c724aa6db62b9e
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI that directs the user to a URL seemingly related to ITIL operational support, likely a social engineering lure. While no scripts were extracted, the presence of the embedded URI and the ClamAV detection strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/um1bUVUAM38/square?utm_term=itil+operational+support+and+analysis+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f4e4767121636e99b3996c/1626662006703/waxopip.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee89e8462f394a1e465a4f/1626245608774/gta_v_fastest_muscle_cars.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_off0000caa9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA9 16792 bytes
font_01_sfnt_off0000e2bb.bin
b51702888913bf3aeeb2d78951e6e30b2df2fe4fc8c092979c68f0697a11b217		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 17600 bytes
font_02_sfnt_off00011064.bin
1e11ccef8cb9e3bed25aa7a89eaef630dde7068685e35e396e535c9aaeffe740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11064 10656 bytes

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