Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7adc8dc7a0d946d…

MALICIOUS

PDF

74.4 KB Created: 2021-07-13 08:15:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4678beeebdb8cea3eada4ab4d983299f SHA-1: 2fe07a6a2b92e63b9d3f6dd1e62fed7bc3b5d601 SHA-256: b7adc8dc7a0d946d5da8a427b07254802d9fc55ae48cb20535ae9c8f43035db1
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. The presence of a visual download button and embedded URLs, despite some being marked as benign, suggests a phishing or malware distribution attempt. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/~3/4aHNpQc2m6I/square?utm_term=jersey+movie+download+in+tamilplay
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec9a62973f9128ac6ce9ef/1626118754956/lng_bunkering_infrastructure.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7d19de8c3264fe5e4405/1626111257389/tajanavujuwubulukodu.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_off0000c399.bin
176100d056f6e8a891b9a822e6e14d56ff38b6100d485369a1f5a427b1702454		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC399 16016 bytes
font_01_sfnt_off0000ece1.bin
5555d6a6c252dfcea40053fdf4b05d545f428d53bf18c377bb85cfcc4910089e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE1 10812 bytes
font_02_sfnt_off000105e7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105E7 16792 bytes

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