Malicious PDF — malware analysis report

Static analysis result for SHA-256 da80771fd292ecbb…

MALICIOUS

PDF

77.7 KB Created: 2021-07-18 02:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 239c830f9e9729a2bb4583e0716b2706 SHA-1: 26131d6222c539a5e79e851c7a6f6faaf6cd2295 SHA-256: da80771fd292ecbb82b8a85e9f16c4826be107190122c4dabc723c48b9a917d4
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. The file contains embedded URLs, one of which is associated with a feedproxy service, suggesting a potential redirection to a malicious site. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.2210

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/iXsW93xxTQA/square?utm_term=coupe+with+suicide+doors
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb0f5a73a263c31e24749/1626190069416/partial_stomach_removal.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8a6036a023653f6c239a4/1625859587130/small_meat_pig_breeds.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_off0000cf9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF9A 16792 bytes
font_01_sfnt_off0000e7b1.bin
690a26e7ad01ef792a898168819dcacf6ffe05ec282b98fc61b67be4ee7705b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B1 10516 bytes
font_02_sfnt_off0000ffde.bin
c3cbb0ac69b9b4ae77a9535240f5706acaaba1a7f8c72cf2a062920a1ba100e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDE 16900 bytes

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