Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2c47d6dc4d6c792…

MALICIOUS

PDF

71.9 KB Created: 2021-07-15 20:34:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: af8edc1cbcfc86e186802a259d28d012 SHA-1: 0e918a8eb02205f68cd04f801a112815679d2a7d SHA-256: f2c47d6dc4d6c792a0b10628a6302a1ac327da5d42bc2590044b04b869bf3d9e
96 Risk Score

Malware Insights

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

The file was detected by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0', indicating a known phishing or trojanized PDF. The ML classifier also flagged it with a high probability of being malicious. While no scripts were extracted, the presence of an external URI suggests a potential attempt to download further malicious content or redirect the user. The document body was heavily obfuscated and truncated, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6583

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/eaN1Eb74jJI/square?utm_term=purpose+of+once+more+to+the+lake
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9478e07849485499e97c/1626117240351/74460131527.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd01e8f209f4d82829b34/1626198047062/76410709232.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e827067be683581ce57801/1625827078798/fire_aaron_boone.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_off0000be28.bin
a610e555d24a5412a451c295da1bd1604a69d04aa879791cdeb33e13a11acb4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE28 10848 bytes
font_01_sfnt_off0000d70d.bin
5b765cc0fe2ce8ee349108f164c2afa291ddb81c945146be6bdfd442e6ad39f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD70D 14768 bytes
font_02_sfnt_off0000fbf4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF4 16792 bytes

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