Malicious PDF — malware analysis report

Static analysis result for SHA-256 c795502da97dc91f…

MALICIOUS

PDF

94.6 KB Created: 2021-07-12 23:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbdea959371b1779bb191ba43a9a3eb3 SHA-1: 1df15627151849772bdd4e551f62d79829618088 SHA-256: c795502da97dc91f1fcee294f4a783fee27f98458c729847a78f885a65887e36
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The PDF contains embedded URLs that point to external websites, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1448

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/uzX87CUNjRg/square?utm_term=automatically+rewrite+the+full+text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c2b23601b306b46fd409/1625866930096/spt_therapy_abbreviation.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e841608fb0dc0613f11969/1625833824128/nba_2k17_android.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_off00011059.bin
3e3a89832095afd952090628c9f0e2da669b0223fef9478b8d43eb39ba5737ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11059 17416 bytes
font_01_sfnt_off00013e24.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E24 16792 bytes
font_02_sfnt_off0001563b.bin
cb4500581ba2dc901bcef23a341dbc80c0d1d16bf7b07fcff9b9ca38550b605d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1563B 10712 bytes

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