Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dfd4b122a04f3bc…

MALICIOUS

PDF

78.0 KB Created: 2021-07-20 19:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a79359f28aec09e31118fbae8f11d64 SHA-1: aa3dc2ff00155b19e4f28f6b968a81e9514b178f SHA-256: 5dfd4b122a04f3bc493d8618acaf1608e9b81613f3cb23d7ca5b40f2543e5b98
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that point to external resources, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of common techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8374

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/UQ8tT55rDuk/square?utm_term=scan+a+pdf+to+word
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edcb3c8e89d93564d2e13b/1626196796953/zekokoliwusoroto.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8e411996685841a97421/1626115649581/81252483780.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e79da4b977dd1475c668f7/1625791908644/what_does_alu_stand_for.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a789b2f3fd7b937a30a8/1626384265520/ionization_by_collision.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f3f4f5668793736d37a35a/1626600693442/love_with_enemy.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_off0000d236.bin
81c3ddaee8f3dbbc2797bc56aeea60a4037910f782c2371ac9dccc0eb7c9709f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD236 16528 bytes
font_01_sfnt_off0000fd05.bin
e515d9801920014a1fae2b3f49b94cfb44a12db33328379793ef0b513ab8579d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD05 10336 bytes
font_02_sfnt_off0001148f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1148F 16792 bytes

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