PDF malware analysis — malicious · 20f613145b272a2a

MALICIOUS

PDF

77.8 KB Created: 2021-07-13 13:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: eb4c96e5e38995d5edc317ae6d63b129 SHA-1: 7f56ae8ae46aef651a543c8bd7f2514fc35cb025 SHA-256: 20f613145b272a2a1edb206a13c7adec2ab640d8c8b42687172808a48a062fac

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains embedded URLs, one of which is a Google feedproxy URL that resolves to a recipe, but other embedded URLs point to Squarespace documents. The document body is heavily obfuscated and unreadable, preventing a clear understanding of its specific lure. However, the presence of multiple embedded URLs suggests an attempt to redirect the user to external content, characteristic of phishing or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9680

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/~3/4aHNpQc2m6I/square?utm_term=whole30+chicken+korma
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecc1eca9c2f82f7833c632/1626128876854/epigastric_pain_after_cholecystectomy.pdf
- https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed2a59b8016c0d1ad3df3a/1626155609540/disobejarizagad.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8070523621b4743e5b2f5/1625818885537/32391284528.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e90cd3025aa46e30d1f2f3/1625885907245/wesavimonufabeju.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e771629d016f55d43eba4e/1625780578708/combine_with_table_of_contents.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8c76dd2f17c4cdf404bdd/1625868141740/vugafe.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed19936ebf0d48ea8be0a8/1626151315669/balanced_equation_for_complete_combustion_of_hexane.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7f5c4a431ed42d2fcf46f/1625814468147/82654326190.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_off0000cd72.bin` `6e91c88e06ef0bdea0e3a80a858d27594bdf32d0bac4779ab81f4ccc2f998905`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD72	17564 bytes
`font_01_sfnt_off0000fb10.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB10	16792 bytes
`font_02_sfnt_off00011327.bin` `c5c914bad9e5e666a3c9bdf8fe7881cbfa06d1d2d32ba9270124d6967f023291`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11327	10608 bytes

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