Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddc7e6ed4914af4…

MALICIOUS

PDF

76.7 KB Created: 2021-07-20 02:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85f0f2627bb8fa70f391729c6f757720 SHA-1: af46c4f3f395ca2e4a475737ec00c5196b0e131d SHA-256: 2ddc7e6ed4914af47e0500c88e6164a0ce25012f2e400e6b4433439e02acede0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it is designed to deceive users, likely leading to credential harvesting or further malware delivery. The document body appears to be malformed or encrypted, preventing a direct analysis of its content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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=student+aid+repayment
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f08960b92d5a7435dd24c5/1626376544946/31974715175.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3f2a35f13a15bd824ca73/1626600099491/jaxat.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5b7ce7148d06bc72deb6/1626233724265/25918047875.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f5b602880c1f5257a37901/1626715651197/24021850643.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f1d1c2e3854805fef78958/1626460611030/how_do_you_cook_a_smoked_turkey_leg.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed858bb1b13d3c3c129470/1626178955982/17594679026.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f355ed26e2e727c262103e/1626559981423/2556284751.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_off0000c962.bin
6ed536ac03c6f78f38a6e3944d9453fa0d1d1efc2f254bbe6be5c4e24fd8e58d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC962 10508 bytes
font_01_sfnt_off0000e156.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE156 16792 bytes
font_02_sfnt_off0000f968.bin
9f1c15c0e0abcc91f4fcaff940d39eac8d348392ab0927aa34ff61a32fe002ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF968 17376 bytes

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