Malicious PDF — malware analysis report

Static analysis result for SHA-256 94bff5c5c0444427…

MALICIOUS

PDF

73.1 KB Created: 2021-07-12 20:26:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c50e7e539cc27b206590e9daca7a3f1 SHA-1: 066b2cd9fbaef41c2f0a5a14f910c4fcf0a9f110 SHA-256: 94bff5c5c0444427d196a830aaff20b27d27b9462278267e71858f304bed46fc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The embedded URL, disguised as a guide for exporting Word documents to PDF, likely serves as a lure to direct users to a malicious site or download further malware. No scripts were extracted, but the PDF structure and embedded URLs suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6193

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/y83TWYo-3DA/square?utm_term=how+to+export+word+doc+to+pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec79baa3e9df788e6c519a/1626110394271/how_to_use_manual_film_camera.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e870c28f543d48c8825bc3/1625845954494/michael_jackson_and_taylor_swift.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e85e24e399a569e0ca5d63/1625841188693/kexuvodinegumagupevoxaz.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e88bec5d0e3031b71f9710/1625852908339/46274123052.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_off0000c076.bin
eabe390bfb3bb293ac661c8f34544b12d3447b0217a707845a8613f7dc6c4ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC076 10220 bytes
font_01_sfnt_off0000d780.bin
3fd3b3ad763bb850c9ef43a67a3c9b234006518370e897c333150a51be49e3d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD780 15964 bytes
font_02_sfnt_off000100b5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100B5 16792 bytes

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