Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fa01c392f378b1…

MALICIOUS

PDF

78.6 KB Created: 2021-07-16 00:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e172093c02288ac9bcea155e3504a4d1 SHA-1: d06a2c1581bf0a7fd5bc9ac758300f634e07c594 SHA-256: 64fa01c392f378b17c1d541c8b432b5183ac59304e8b49eab4973391206d8db9
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded URLs, one of which is a Google Feedproxy URL that leads to a PDF file hosted on squarespace.com. The presence of these elements suggests the document is designed to lure the user into downloading and executing a secondary payload, likely exploiting a PDF vulnerability.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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/gPkW7oTCsL0/square?utm_term=after+school+to+college+trigonometry
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efd69896309e3685a9017b/1626330776291/recurrent_anal_fissure.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f0a513f29c40469268b579/1626383636198/giramixodafefavof.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca1cfbcf8be39b5081c40/1626120655208/by_in_large_phrase.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e91313563c1506a8b5a4a9/1625887508029/game_fast_and_furious_ps2.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd1628443ee2c892e7721/1626198370452/pisces_star_sign_compatibility.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_off0000d257.bin
cbef07c9aabe22aa2c9376620b2aff7b25e2fd94992f32f66442b054ee3d3a70		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD257 16824 bytes
font_01_sfnt_off0000fde4.bin
1eafd5ef6c2d13fafd3c3dd073fd6b5d2a05bc669ac2dd21a06c7c0cce3b401e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE4 10716 bytes
font_02_sfnt_off00011659.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11659 16792 bytes

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