Malicious PDF — malware analysis report

Static analysis result for SHA-256 812505c69c41957c…

MALICIOUS

PDF

85.3 KB Created: 2021-07-18 08:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a86cb3f028da93f581078eaa0e299be SHA-1: c8b1c9f972f3b6128ff03e871630859c1a0c69aa SHA-256: 812505c69c41957c63b979046143f8ee3beb757afd07f771ec81918e3ec15bc1
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a specific signature indicating it is a PDF phishing trojan. It contains embedded URIs that point to external resources, suggesting an attempt to redirect the user to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier clean score 0.1741

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/AG-UZpNbJGc/square?utm_term=need+for+speed+most+wanted+2005+apk+for+android
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee5391fc191471fc6defd0/1626231697776/98729590625.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e838e023621b4743e7c709/1625831648530/rabizabiroleb.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_off0000daa6.bin
7b39658b1b3ef2f787f7cb629d30451903d9903bc31ae40593b23e2d1d954af3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA6 11144 bytes
font_01_sfnt_off0000f4d8.bin
327d56616b17d7b9e30c739cc6f9a189b9263c637cf38b29f799d53b3c4f1e81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D8 22932 bytes
font_02_sfnt_off00012f64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F64 16792 bytes

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