Malicious PDF — malware analysis report

Static analysis result for SHA-256 d90ad86174979f25…

MALICIOUS

PDF

84.0 KB Created: 2021-07-15 20:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e4322d1523c55c30330fd4f57b1b3b17 SHA-1: 32b5ef9ad40209ad4e0aa61aa4cea42e93488cce SHA-256: d90ad86174979f25106ee0b0af032587c24dc6e79eda09b87b35a626f19bb75d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing attempt. It contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a compromised site, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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/~3/5Aj-mlxkUx8/square?utm_term=low+red+blood+cells+low+hemoglobin+low+hematocrit
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee17afdf274736e0a8c94a/1626216367262/pofimisikezituvavagonede.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e94b1bdb8bb141bada9878/1625901852123/1766830970.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0157e36870d1a2db82782/1626346878913/10th_standard_social_guide_download.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_off0000e90b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 16792 bytes
font_01_sfnt_off00010122.bin
463300475b8b5c314198e80c8d6cef926ca4dc296d93cabcad3cd19046c19483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10122 11000 bytes
font_02_sfnt_off00011a4f.bin
a3a5e01fa6247dc322dfde1a515befd44dfef86d7e09dd6a70cd77acefae1413		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A4F 16088 bytes

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