Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6d5291de6c75256…

MALICIOUS

PDF

75.1 KB Created: 2021-07-13 22:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ca3379ab10d294063b53eae3ee421ed SHA-1: 128494ead9938ae6d2f5cc53fbbf6a2aa9ab2c3f SHA-256: a6d5291de6c752561b4fe5f87be86c3ce482429080c0f6aea7abdc3126cdbdd3
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as a phishing trojan. While no document body text was readable, the presence of a PDF_URI heuristic pointing to a URL, combined with the ML classifier and ClamAV detection, strongly suggests a phishing or malware delivery attempt. The heuristic 'SE_DOWNLOAD_BUTTON' further supports the idea that the document is designed to trick the user into performing an action, likely downloading a malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=aadhar+card+gazetted+officer
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e940b7025aa46e30d3de1b/1625899191381/cherokee_county_land_for_sale.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7693de055dd31fd067685/1625778493855/dos_batch_file_variables.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ece572c76d6b0ba006e917/1626137970155/old_hickory_steakhouse_at_gaylord_opryland.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e78d9c1d61f435cef35bdc/1625787804684/online_images_to.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_off0000c604.bin
6cf5d6386991b9d714f6c1e04507f689681b03d6f8cc88c74e927ba697169ab4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC604 10476 bytes
font_01_sfnt_off0000ddd2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD2 16792 bytes
font_02_sfnt_off0000f5e4.bin
9bdab1218512fd6177afcfb6a3117e1c4422a5c694453a3a9d9f5140ea8c79de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E4 16352 bytes

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