Malicious PDF — malware analysis report

Static analysis result for SHA-256 805cf9d2d811a4fa…

MALICIOUS

PDF

74.2 KB Created: 2021-07-15 16:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fa984c56995e59247deec4c19e676a6 SHA-1: c5995d33af84be013e31d7c675fd288c27401698 SHA-256: 805cf9d2d811a4fa08414054f7501983b1b10ba776dab7d93a6208e6ddaa4c17
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. The document contains an embedded URI that points to a feed, likely intended to trick the user into visiting a malicious site. While no scripts were directly extracted, the PDF structure and embedded URI suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/kVSxLQpkboc/square?utm_term=irs+schedule+d+for+2020
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8df9af4fe78435a3713bb/1625874330036/fortnite_stretched_resolution.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8d71b5ef51a130ea0fc62/1625872155962/12th_hsc_geography_notes.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_off0000c35c.bin
6daf7d41d71ba628afde161b85fe678cedca202cf8ba7204f3b5d65ce1657f0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC35C 16300 bytes
font_01_sfnt_off0000ed89.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED89 16792 bytes
font_02_sfnt_off000105a0.bin
f9bed2d7a3951813da5554beddefc5f641d21090b28a010758d6e2cb2a3efe26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 10408 bytes

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