Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fb421e37011e63…

MALICIOUS

PDF

105.8 KB Created: 2021-07-14 05:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86df2af94ce30cec3710507f95110d33 SHA-1: 7572eb265ff8b7c412fdc6f53f738c5c744bdc82 SHA-256: f8fb421e37011e632797c33ac068401c7003ae8dd7207b32591fd8df44e5edc3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URI that points to a URL, likely intended to redirect the user to a malicious website. ClamAV detected this file as Pdf.Phishing.Trojan, indicating a phishing attempt. The presence of embedded URLs and the ClamAV detection strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier clean score 0.1439

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://feedproxy.google.com/~r/sq/ugae/~3/0YvHz_IItD0/square?utm_term=states+of+matter+class+11+solutions
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ee093407d0587a375ebfa5/1626212660757/how_to_unlock_read_only_word.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_off00013a2a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A2A 16792 bytes
font_01_sfnt_off0001523c.bin
c756d79fd373352cf1429c34705d91ed8fd00d9b71a9949cb0c4ec20bc1800ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1523C 17832 bytes
font_02_sfnt_off00018152.bin
8fd70516d83e5bd792f091518066a45acd70a2ede4b8c28853a59b6969f9de91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18152 10724 bytes

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