Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1e1565b109a5a22…

MALICIOUS

PDF

72.7 KB Created: 2021-07-15 18:02:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e025a2792d44e05c60427a5a2db4fcf SHA-1: 8894223423f473ce091440a22cc1202315b2f616 SHA-256: c1e1565b109a5a22fa3b2726cea5a4e8f8cac348626eb7de78a79c8fdcc8b215
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as 'Pdf.Phishing.Trojan'. An external URI, 'https://queure.ru/square?utm_term=fly+24+hrs', was found embedded within the document. While no scripts were directly extracted, the presence of a phishing-related detection and an external URL strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1797

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://queure.ru/square?utm_term=fly+24+hrs
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8b72d1181ea03e78fe8e7/1625863981637/51440021396.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8b5584129c85887a6becb/1625863512275/95225211240.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_off0000bd43.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD43 16792 bytes
font_01_sfnt_off0000d555.bin
67290f22ccd483ed60c3a783b4cba285c33e55709f55bf8850e563e0a74e4e51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD555 17100 bytes
font_02_sfnt_off0001024a.bin
f27cd09f1497d9836c189ded37355ce0c488590aec06db83e3b01e2e346dee9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1024A 9788 bytes

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