Malicious PDF — malware analysis report

Static analysis result for SHA-256 3119a4ca13367fdf…

MALICIOUS

PDF

76.5 KB Created: 2021-07-17 17:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6ddf0c5a3af106e4ba835d0850da9c91 SHA-1: b5b530761ba1bc2d844034de888f8255fdd53b57 SHA-256: 3119a4ca13367fdff25afacd7c1f7998a728311beb3eaf67eb3f38edd43bab95
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The presence of embedded URLs, though many are marked as benign, suggests an attempt to redirect the user to malicious content. The PDF structure and embedded objects are consistent with malware delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/XMoLd4EPXkg/square?utm_term=steps+of+extension+programme+planning
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79786ad76c09748f2e08/1626110328955/jezinimefazidigojeko.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93208563c1506a8b6b066/1625895432994/imo_free_video_call_and_chat_apk_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7c6ea5c13cc4fede9ed53/1625802475011/53706311823.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8d3d69ff658241832aa3d/1625871318300/best_way_to_reheat_fried_rice.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_off0000ccaf.bin
14cdbcab97f6c8d0c1508c54c452a7b352689d1762f52157fd8556b00494e7a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAF 15788 bytes
font_01_sfnt_off0000f523.bin
e9c8198d08fadcb27ff1ff2e509224f9ba7bddd7ddf65a6cd2732c990316c6f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF523 10876 bytes
font_02_sfnt_off00010e44.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E44 16792 bytes

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