PDF malware analysis — malicious · da668ebbf3dad785

MALICIOUS

PDF

77.4 KB Created: 2021-07-14 07:15:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 0aedb6a07f4a0809bf5a9256709c1e94 SHA-1: 316e46020df37188f5a11f7a0025f814abf52af4 SHA-256: da668ebbf3dad785f87e81053c91c1294a0074c31cab337a8900cc04e4a20df7

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ClamAV detection and ML classifier strongly indicate maliciousness, classifying it as a phishing trojan. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to lure the user to external resources. The PDF_URI heuristic points to an external URI, likely part of the attack chain. The sample's nature as a PDF with embedded content and external links aligns with common phishing and exploit delivery techniques.

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/~3/5JeRQhMeIYg/square?utm_term=tractor+ploughing+manual
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8b242203dd5565425290f/1625862722897/58153637568.pdf
- https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecaa997b14134336e06bb8/1626122905271/40765185989.pdf
- https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee02614485e4216905a4fb/1626210913766/mefaxilejojidilobonuzomi.pdf
- https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8e1069d4b6336147bb36/1626115600754/bruner_theory_of_instruction.pdf
- https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e94f6637da2614570f9774/1625902950937/985584004.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8cb30dd5c0c1026ef2bbc/1625869104791/78851458595.pdf
- https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ecf967c2b47a61419db754/1626143079783/30268737111.pdf
- https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e884fc53c74a4e2499c69c/1625851132301/will_ps3_move_work_on_ps4.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_off0000cd75.bin` `e5bb4a88ebe25ae41932d211c2cb7f7dcd08a293b9e13808b803c7ad2b9b2158`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD75	10584 bytes
`font_01_sfnt_off0000e561.bin` `76e1d7db0866f118b31672111108dce8bb3d0cb468171c111a70d763f9189e20`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE561	16984 bytes
`font_02_sfnt_off00011193.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11193	16792 bytes

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