Malicious PDF — malware analysis report

Static analysis result for SHA-256 f76e3ebeb34aed7a…

MALICIOUS

PDF

71.8 KB Created: 2021-07-16 01:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0a95dcc316626c44348a15267d76b482 SHA-1: 5e27cd6e8b136850d17d90dbc1a2fb81c1f02fda SHA-256: f76e3ebeb34aed7a41eaf1d8fac34b1a3a9ecb9457213c9bbd3724e27a426d52
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a phishing and trojan signature. It contains an embedded URI that, while flagged as benign, is part of a chain that likely leads to a malicious resource. The document's structure and the presence of embedded links suggest a phishing attempt designed to trick users into navigating to a harmful site, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1558

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/eaN1Eb74jJI/square?utm_term=english+life+elementary+student%27s+book+pdf PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee067bcb43530604ac5672/1626211963910/viguxotiwa.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edff4bbf52576c624aa1df/1626210123313/typhus_is_caused_by.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b392.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB392 17148 bytes
SHA-256: 9a3a55b8750233995da62a2b6ff6ea244832267250cc7fa38b06947e1590a42b
font_01_sfnt_off0000df42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF759 11408 bytes
SHA-256: 986df7929a8cdf35abd528eced21698bf4e66057a0f79bc5d62a63a01073e8b3

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