Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd1f86d6b4af92e5…

MALICIOUS

PDF

93.8 KB Created: 2021-07-12 23:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c0275a0e829179d7ebf1b261a9861530 SHA-1: 4be22cb9df8dc019179b19ec0defa0d5ca7d04f2 SHA-256: fd1f86d6b4af92e580d0b9e0339b64e2393fea3d042d1bce9683d1f6c4a93191
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. An external URI heuristic points to a Google feedproxy URL, which likely redirects to a malicious site. While no scripts were extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a phishing or malware distribution site, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.1532

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/pL_UGxDroB4/square?utm_term=ccc+on+confession
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec84d6ff9c8b53cea2958f/1626113238544/xokikomexurevozusefesirat.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_off0001100c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1100C 16792 bytes
font_01_sfnt_off0001281e.bin
59b0f36c8cc50022bca8b2ac4c862e610625adaacc291aea513c0dbe8223e323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1281E 17216 bytes
font_02_sfnt_off000154ad.bin
1fdf84b6b529eb004e9e4f3029b38b4535cdda8ae31d1bc77af86a71f4e6332b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154AD 9956 bytes

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