Malicious PDF — malware analysis report

Static analysis result for SHA-256 d80e620cc1d81d86…

MALICIOUS

PDF

75.6 KB Created: 2021-07-13 17:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a59d4aaa2506a66de29b3d8d8486952e SHA-1: 3ff9d01134b5dfae5345b21d0b945949a64dedd2 SHA-256: d80e620cc1d81d862c0fc20359adba6c64ef25841be86ff0fd99eaff8bbcda04
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating malicious intent. The presence of embedded URLs, although marked as benign, suggests an attempt to redirect the user or download further content. The PDF structure itself contains duplicate objects, which can sometimes be used in exploit techniques.

Machine Learning

  • Nyx PDF Classifier clean score 0.1751

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/NsX9ihectO0/square?utm_term=castle+cary+to+bridgwater
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed381cbde79631d33cf9b5/1626159132122/wifelo.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_off0000c5a1.bin
f614a6f03aaecdd8afd0e8f840034c3c6badaf2a6bd2361fa3f77054bd57b12d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A1 17000 bytes
font_01_sfnt_off0000f243.bin
c14540f0f6645847e4125ca74bb172ab08b893c4de8a628488872c1ae5ca227f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF243 10812 bytes
font_02_sfnt_off00010b30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B30 16792 bytes

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