Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6add84e658120d0…

MALICIOUS

PDF

75.9 KB Created: 2021-07-17 06:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93624eaf5bd3f06c0f2038afeaec7ed7 SHA-1: f6bb1c5ba963d608e639b49b8a09db480ea6f5bb SHA-256: a6add84e658120d06345b3a24a9653dda1ef4ab67c6d0960296bf9f81c7d832b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URI pointing to a Google feedproxy URL, which in turn redirects to a Squarespace hosted PDF. While the specific URLs extracted were benign, the ML classifier and ClamAV detection indicate malicious intent. The PDF structure and embedded objects suggest it's designed to exploit PDF viewers or trick users into navigating to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/mHcMeCcfVl0/square?utm_term=write+a+paragraph+proof
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7ab814d2175279d10ecd1/1625795457632/40247350071.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee3c29df274736e0ab7f4b/1626225705859/nagefose.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e77dd5fa94092a577bab51/1625783766079/19664846826.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f08331d941835b131b820e/1626374961988/driver_booster_7.1_key.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_off0000ca84.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA84 16792 bytes
font_01_sfnt_off0000e29b.bin
59c3b3c9cd390a4242220d79f245f768ab44400737aa14ce9493225559adf11e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE29B 10312 bytes
font_02_sfnt_off0000f9fe.bin
301117526ca00411c24d5ef5b3d6765d414aa87195a24ffa00e12baf8126e0d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 16256 bytes

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