Malicious PDF — malware analysis report

Static analysis result for SHA-256 33f2b86a1a4536d3…

MALICIOUS

PDF

77.5 KB Created: 2021-07-13 20:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 30d0552dac3b0b0043e6eedf422e907d SHA-1: 70ca4902972cbfc6811b25f29eda2131e1584b72 SHA-256: 33f2b86a1a4536d3ac74b3cd0688177c3b49ce8a7ef748b58c62b8f2c94cad78
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified as malicious by ClamAV. It contains an embedded URI that leads to a URL which, based on its query parameters, appears to be a lure for a game. This suggests a phishing or social engineering attack vector. No scripts were extracted, but the presence of an external URI points to a potential redirection or download attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2227

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/razvivatel/yapz/~3/iXsW93xxTQA/square?utm_term=whack+your+boss+unblocked+game
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec946a0e7a3c5fba3efb0c/1626117226894/dunirezabam.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8ca13080d76c7a512166/1626115233440/dj_tanner_then_and_now.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_off0000caed.bin
7675c6d1594a609b7acc49c21857f362feee580fa9f0c107486ed4bce47afd38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAED 11064 bytes
font_01_sfnt_off0000e457.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE457 16792 bytes
font_02_sfnt_off0000fc69.bin
3e9fb5b8e21fe238e191742cd1843f5b4dd48d595465f615b07c826194fded10		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC69 17644 bytes

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