Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f83c0e50fd5a7d…

MALICIOUS

PDF

73.7 KB Created: 2021-07-15 19:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b6a11d8aa495b29fb20a7b916aa9163 SHA-1: 1bdeefa1be220462fe0eaf58f9f62915314f8293 SHA-256: e8f83c0e50fd5a7dc4ca42c2536ee4b2ef472253d6f55cabb1c77207e62558c5
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan. The presence of embedded URLs, some of which are associated with benign content, suggests a lure to a phishing site or a download location. The PDF structure itself contains indicators of potential exploitation, as evidenced by the 'PDF_DUPLICATE_OBJ_BODY_INCREMENTAL' heuristic.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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/rCno-htTzZk/square?utm_term=k9+dogs+for+sale+near+me
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edc4a04c056a31b81886e3/1626195104844/variable_in_statistics_meaning.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edf9f4ad58ca03d229b5ec/1626208756676/engineering_mechanics_statics_and_dynamics_5th_edition_solutions.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_off0000bdf4.bin
123c9632afd318fbe17620ced39a8f3985c972e8d8a440531079aa05a2f6fac0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF4 17168 bytes
font_01_sfnt_off0000eb2c.bin
be1518e1e0b3aebcbfd7551dfcb87f0a5f1879f974463ba5eb5a376ddd12551c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2C 10664 bytes
font_02_sfnt_off00010364.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10364 16792 bytes

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