Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d7b65f84e501c3…

MALICIOUS

PDF

84.7 KB Created: 2021-07-14 09:46:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fd753c1e06bda178d82f87b67e049f3 SHA-1: 3ee5986f4f97cb03f4dac431986f748cf9c00706 SHA-256: c5d7b65f84e501c30dd24d6293f7f6942bd6078703338ff49f5bea40005966b3
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 a phishing attempt. The presence of embedded URLs, even those confirmed benign, suggests an attempt to lure users to external resources. The PDF structure itself contains indicators of potential exploitation, though no specific script was extracted to detail its execution flow.

Machine Learning

  • Nyx PDF Classifier clean score 0.1630

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/ZFaGRQ6RLlg/square?utm_term=salty+cabbage+kimchi
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec908790a3fc49531a5865/1626116231650/wall_and_door_same_colour.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_off0000eacc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEACC 16792 bytes
font_01_sfnt_off000102de.bin
ce3bcac32d81a8507ff6a880e24dbb975430eaec9c317f8f872046ac94db7d45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102DE 17216 bytes
font_02_sfnt_off00012f79.bin
81187239ed79749469f66fd0504e85de76fab8fe1fcb996bc39e3a866ed66911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F79 10604 bytes

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