Malicious PDF — malware analysis report

Static analysis result for SHA-256 9337f5d2b62e4b5a…

MALICIOUS

PDF

73.3 KB Created: 2021-07-19 03:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b08ddc065a85bec4d223e36bd234dd94 SHA-1: 85210f4e2f4ed3dea798341a6b1f88d5485118f6 SHA-256: 9337f5d2b62e4b5a5235ab2bda0d5b98488ac76aaa492f4311ac8336fe30825c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains an embedded URL that, while currently flagged as benign, is likely intended to redirect the user to a malicious site. The PDF structure and heuristics suggest an attempt to exploit user interaction through a deceptive link.

Machine Learning

  • Nyx PDF Classifier clean score 0.1869

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/k6oGaauGqGM/square?utm_term=the+power+of+critical+thinking+5th+canadian+edition+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7d4bc28bb5f4f51631f80/1625806012318/zogutefi.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec94587dc7460dd09c30d9/1626117208459/gogenejatuwazigofatimuza.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_off0000c08d.bin
6bd411520ec3c8bafe6db248d84eb41fbf0262a0378ac743812bee65ba7796ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC08D 11008 bytes
font_01_sfnt_off0000d9fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FE 16792 bytes
font_02_sfnt_off0000f210.bin
cb7baae057a66e973264c16f6d1626de85a3cd0236e2dc68db4eb5c4810af81c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF210 15380 bytes

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