PDF malware analysis — malicious · 2232feba522c70f9

MALICIOUS

PDF

77.3 KB Created: 2021-07-14 09:24:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 6777912ed5c0fd0396516dd6ea6ad061 SHA-1: 92b164774826381f7c8791736f4e677924429267 SHA-256: 2232feba522c70f95b4bce6d88e8144c9d139c5818c9a34b6814687da31b8982

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by heuristics and a machine learning classifier as malicious. ClamAV also detected it as a phishing trojan. The document body is heavily obfuscated and unreadable, but the presence of the external URI strongly suggests a phishing or malware delivery attempt.

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://huntic.ru/square?utm_term=find+the+gcf+of+15+and+45
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca8f9c81c37306b325a99/1626122489863/kuwerifevexobizenukofiv.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee64db39b82603386c97cd/1626236123153/bile_leak_after_cholecystectomy_icd_10.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee7e70a005482cc15a1c83/1626242672986/26927827101.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee1ccc9c71001bedf364a6/1626217676787/lotto_results_19_august_2020.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec77f5c8b0d544b6d6765e/1626109941558/appreciation_letter_to_parents_from_school.pdf
- https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8779f211c9314ad41578f/1625847711609/tutaweganusitelisi.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edb8feb2cb0e52868ca713/1626192126544/natural_a_minor_scale.pdf
- https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee33d02485902f3e72bf37/1626223568393/zoduzezoziwopitebigubine.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee0527895aae42f65e2c6f/1626211624771/bovaferevixuzefav.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_off0000cd76.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD76	16792 bytes
`font_01_sfnt_off0000e58d.bin` `76b8c312c1d27e456e8b63ac746f914802bdaa0348d8e841d2c7fe06e2237b4b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE58D	10680 bytes
`font_02_sfnt_off0000fdcf.bin` `f7e3e24e525f554fc5bb0370c54b7541896314fad1cd958fc690c6344948aaa2`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDCF	16600 bytes

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