Malicious PDF — malware analysis report

Static analysis result for SHA-256 658973790159d25f…

MALICIOUS

PDF

78.4 KB Created: 2021-07-13 21:53:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fd5469b7d017f3521256a9fe4ee50f42 SHA-1: d8a4e0e931413cd3c0e60952fca9442ca86f60ec SHA-256: 658973790159d25f34797e450594ec9b53079158f92501fa7d5e6ee5d3b185d9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and also received a high score from an ML classifier, indicating malicious intent. The presence of an external URI, although marked as benign, suggests potential for further malicious activity or redirection. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/gPkW7oTCsL0/square?utm_term=soil+core+cutting+test+is+code
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8ce6b54da9c6696c559fd/1625869931985/frances_declaration_of_the_rights_of_man.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8b23a1c98860cff5be253/1625862714792/pizemukaziwedanexodimozu.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec794531b0b43e07e5bc49/1626110278055/wopofesapopokagapik.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_off0000d04a.bin
e9da224fddddeadd4d9d91d1a42f9f128724b0128dd3d56fd588f14cecbb833d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD04A 17592 bytes
font_01_sfnt_off0000fe40.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE40 16792 bytes
font_02_sfnt_off00011657.bin
8039cd8649946b6e6452a5720e8f334a9c30e65a0972dfc1325e160056f3eb2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11657 10556 bytes

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