Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c2217ebf4418ff…

MALICIOUS

PDF

77.2 KB Created: 2021-07-20 10:20:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5d309beb55e7d58f9b8a2188139e8778 SHA-1: 2f8a179edd1ad4bef8099b019ce168646b0930b2 SHA-256: f7c2217ebf4418ff3eba5b3a6f829d472fcded3b1f160494f9a8f0b931b6d651
96 Risk Score

Malware Insights

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

This PDF file was flagged by both a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to lure the user to external resources. The file's structure and the nature of the detections point towards a phishing or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://feedproxy.google.com/~r/sq/ugae/~3/5JeRQhMeIYg/square?utm_term=acnh+new+villagers
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f339629ee5897bffa11258/1626552674333/dogs_with_corkscrew_tails.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f38c22a8f65e35b6dc3df7/1626573858826/another_name_for_indigo.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f3a69b22602c08caf3b59d/1626580635611/fowefotediv.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edc2e2b0089c62dc3b3bba/1626194658599/unreasonableness_in_administrative_law.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f16828d1fa142bceb27925/1626433576793/hand_gloves_cutting_and_stitching.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f640310e346c311155d744/1626751025418/apple_banana_smoothie.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7c38b45e16b3be7e86bf1/1625801611707/similes_metaphors_hyperbole_and_personification.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f2abad04a1d97017943412/1626516397204/10844063713.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f40c9ec5d9e6782ce8230b/1626606750507/headway_elementary_book.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_off0000d004.bin
2478243a55cbdd02dc19d9c0359ddaa00cc1415f2ce2151e91b51d7ab175db2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD004 15956 bytes
font_01_sfnt_off0000f966.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 16792 bytes
font_02_sfnt_off0001117d.bin
1c28b663467d174a3392079bf5f5e69e5a74dfc08e2fbd6539a352240eae5622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1117D 10424 bytes

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