Malicious PDF — malware analysis report

Static analysis result for SHA-256 54f4292890dfd76e…

MALICIOUS

PDF

87.3 KB Created: 2021-07-14 09:04:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1aa97dccdb8506ccd560788b9367481c SHA-1: b9f91762864c421960c262689537fc532e5bdc07 SHA-256: 54f4292890dfd76e52dc15e4d7ae28bbece3096b9df2e27eb70e63f125176dfd
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution attempt. The presence of embedded URLs suggests it may attempt to redirect the user to malicious sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are common in spearphishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5959

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/~3/1LSSs5qy-i4/square?utm_term=the+fives+downtown
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee2ecf84a0477e84aa56fe/1626222287236/after_appendix_removal.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec830cfd54eb070825df86/1626112780397/kuludozumarovubape.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9497ac91b61347ea4dad1/1625901434473/gidawe.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9038a1b53f2c225ea55f/1626116152930/24468003333.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_off0000f59b.bin
69d9858bb45f7518985992345db64fd2373dbdf8dfa7fa29268665d407e1709d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF59B 10260 bytes
font_01_sfnt_off00010cb6.bin
83eb9453b662549c00961d4f5cb15fb12cfe8d5e98966f3870283ba692d9df49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB6 17104 bytes
font_02_sfnt_off00013992.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13992 16792 bytes

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