Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a94082c3b00f739…

MALICIOUS

PDF

74.7 KB Created: 2021-07-13 19:39:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 040f285ca3f6871d8b4c9045f2598aaf SHA-1: de6896bacb45d9e0a5f3b9ad79b66e9b2f9f80d1 SHA-256: 7a94082c3b00f7397331d3f2ae24424bbca7c5f30be3e338712ac61eb67087f6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded URLs, suggesting it may be used for phishing or to download a secondary payload. The presence of PDF_URI and EMBEDDED_URL heuristics indicates an attempt to redirect the user to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7788

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/razvivatel/yapz/~3/v-xubMviL4Y/square?utm_term=what+do+u+mean+by+niece
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8523063fd3b750ba36864/1625838128133/21074858105.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9331b8ce0e10532d343fa/1625895707711/botany_questions_and_answers_download.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8f3a69d4b6336147dc75/1626115899062/bupiduguboboloxoroza.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_off0000c366.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC366 16792 bytes
font_01_sfnt_off0000db78.bin
baed08ddaf70bf622a8b940e3859e807a257a41fb9818a8fb063a38950cd80fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB78 17080 bytes
font_02_sfnt_off00010819.bin
321735d41b1a9d07b92a1b4febc74d7d717a9c75c6a1d3a861e14a96ddc4ba0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 10668 bytes

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