Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ebcecd46352860…

MALICIOUS

PDF

76.3 KB Created: 2021-07-13 00:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 747e3c25e5670ddafee8f0fc99850008 SHA-1: 50e009edadc69f0750ecb75ad81c08f8764e7605 SHA-256: 83ebcecd463528603739d483a6bd600a71611d5c42059768b2091d2f68a53a95
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as Pdf.Phishing.Trojan. The embedded URL, 'https://archism.ru/square?utm_term=a+rage+of+dragons', is suspicious and likely leads to a phishing or malware distribution site. The file's metadata indicates it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8028

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://archism.ru/square?utm_term=a+rage+of+dragons
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8e255cc7c086459238e5e/1625875029819/movosoxekinolomemuzu.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e91008e6a58043b690deab/1625886728776/apa_bibliography_double_spaced.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7701668ba31612b4b4cd/1626109697868/92323329647.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_off0000cbce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCE 16792 bytes
font_01_sfnt_off0000e3e0.bin
dec3215410721c9ec059ee45847aa59c6155014ce39b558b4854d38fdb0bf44f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E0 16144 bytes
font_02_sfnt_off00010d57.bin
603db91bc5ef9b51ffa7fddf231ea5eaea4cd6d1bdf27ac198a7825fc563d28e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D57 10276 bytes

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