Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e552df3f09bace…

MALICIOUS

PDF

73.5 KB Created: 2021-07-13 14:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 60330f3e3a6d815783a5caf501615cb8 SHA-1: 4c7e8decc8964554e257c31bcabad45e6eb090ec SHA-256: a0e552df3f09bacedfcb8f82a25cb9dd4abfa720939e10ddc4f4fc7cb5d5e5a0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URI pointing to a suspicious domain. ClamAV detection further indicates malicious intent, specifically classifying it as a phishing trojan. While no scripts were directly extracted, the presence of an external URI in a malicious PDF strongly suggests an attempt to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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://catamma.ru/square?utm_term=happy+teachers+day+cartoon+images
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ed625a6ebf0d48ea8eb4f2/1626169947172/nipukufixomiw.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7990f89f8e700bf67243/1626110352368/xorinujotofexejukeniva.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_off0000c054.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC054 16792 bytes
font_01_sfnt_off0000d866.bin
0cf6b9f34f45b6ff3202b86e808484e660a438a8dc940c276c46d2b4e18d6a71		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD866 15772 bytes
font_02_sfnt_off00010136.bin
145750e999eecf0228a13ef11fa065aed54965f7918bd613fead678f3cb8858a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 11020 bytes

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