Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa595f616be70493…

MALICIOUS

PDF

78.9 KB Created: 2021-07-18 01:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0793ecb85079307ab451b41256019854 SHA-1: 058cc5a9e3a3978757204b34708c527b0778c009 SHA-256: aa595f616be704933a89a5d97f8170687b903abb62b98bd80a198c12ec6f8564
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being labeled as benign, suggests a potential phishing or malware distribution vector. The file's structure and detection as 'Pdf.Phishing.Trojan' point towards a common attack pattern for delivering malicious content.

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/NsX9ihectO0/square?utm_term=all+words+that+start+with+t
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9957651b7076defc8580/1626118488034/vufolejipe.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee233e2ee8b51fd9336618/1626219326178/gta_online_property_map.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edc260537dfa200401c60e/1626194528725/jotobofenakoporofaxobi.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_off0000d426.bin
7ab051d54f127c86433f7fca4fc49a3f9ba8f508b83da9b3876e6d4a7daa58c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD426 16808 bytes
font_01_sfnt_off0000ff83.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 16792 bytes
font_02_sfnt_off0001179a.bin
8e6656797bb1a8e4ed1fc725cb3bc2fdc66c02b608462c3879aaf082e764b3b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1179A 10176 bytes

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