Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c18ffdd94a1819f…

MALICIOUS

PDF

76.9 KB Created: 2021-07-14 06:36:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 51ed73a91e335f60460ad90efedd5614 SHA-1: fa438a97aaeeed5fd67b08a312e475a71ffaf70a SHA-256: 2c18ffdd94a1819fa3fa2705e97494d9a77f6e2333ed2b704a4e82e9d021e3d2
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified by ClamAV as a phishing trojan. It contains an embedded URI that points to a URL, likely intended to redirect the user to a malicious site. No scripts were extracted, but the presence of an embedded URI suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2580

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/cEZ-xJcQpFE/square?utm_term=special+days+in+october
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8b3fceed2fb3579bdab7e/1625863164684/35566424734.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee15ce2ee8b51fd9322b0e/1626215886314/30882589804.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_off0000c835.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC835 16792 bytes
font_01_sfnt_off0000e04c.bin
8cc130a19868dd922160ee4b0993da19cf709832902b43899d6b4638c6592e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE04C 10836 bytes
font_02_sfnt_off0000f92e.bin
cf15d242c9ce42a53a5012dfaa41d088f8b3536591e274cb22cc8c0f4ce8ea7f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF92E 17316 bytes

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