Malicious PDF — malware analysis report

Static analysis result for SHA-256 266f4642249b168f…

MALICIOUS

PDF

75.3 KB Created: 2021-07-13 15:45:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 10a76c61063f30ad92acb723e09267fd SHA-1: 672aca0cbad2ce7a29ceffd636980ff2d9de3d14 SHA-256: 266f4642249b168f89b530fe2d5ea4b163a40117e3250d6e0a0d491343787357
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. The PDF contains an embedded URI that points to a potentially malicious URL, although this specific URL was flagged as benign. The document's structure and embedded objects suggest it is designed to exploit vulnerabilities or trick users into visiting external sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/aauXj3bnHUA/square?utm_term=sperm+x+and+y
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec826ec8b0d544b6d78638/1626112622599/pudet.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e89b747ad5601299592bd4/1625856884893/what_to_read_if_you_like_stephen_king.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_off0000c4df.bin
99fed0601641711c948c660d27bca5f20fb9caa8a73e21232f879c600443c67d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DF 10320 bytes
font_01_sfnt_off0000dc23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 16792 bytes
font_02_sfnt_off0000f435.bin
07bfc8147476ae4fd758166a4406999c7fb27453e5a35573355d7ffbe1cffc4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 17344 bytes

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