PDF malware analysis — malicious · f5c9dead2bf7b4fc

MALICIOUS

PDF

79.6 KB Created: 2021-07-18 06:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 6abf7c01d22099076c2cce8a2766af6f SHA-1: 5bc6073725d3c8d16115cd6c67b979a7716ffaea SHA-256: f5c9dead2bf7b4fc87c4ac5ca5659dbcfb4f01567e6a6bd393d1e49c782cb4e4

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 high likelihood of malicious intent. The presence of an embedded URI suggests an attempt to redirect the user to a potentially malicious external resource. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall context points to a phishing or social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9478

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/UZrB20b2Dcg/square?utm_term=currency+other+than+the+reporting+currency+of+an+enterprise
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee784bb1f8b956488933d8/1626241099712/pawuwasi.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee4d88eed6cd77ab62f2b1/1626230152794/title_22_of_the_code_of_federal_regulations.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7a99b6dedd3ae167db99/1626110617553/the_biggest_cat_in_the_world.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e92d78f107ff2467e978ce/1625894264449/35607954530.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edc3831c6c1a61d52244ad/1626194819737/530952565.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f11d21b3a282695d32bf70/1626414370114/sorelasataluro.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f1a47f98b280032a0885d5/1626449023874/270082516.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f10e776e32095df98275d9/1626410616080/kuxobomi.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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d090.bin` `254b9bb6302027dc5ab32a1b4acc3fa2fa358c99beecad2e6ecd17a8f7c9c814`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD090	17556 bytes
`font_01_sfnt_off0000fe88.bin` `8c954735e27f3fb95e008febaff28fbe53f7f3d5368abb00ba47e67c021401db`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE88	10960 bytes
`font_02_sfnt_off000117ff.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x117FF	16792 bytes

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