PDF malware analysis — malicious · c4d395ed2e79889d

MALICIOUS

PDF

73.9 KB Created: 2021-04-04 18:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: bfd4b6bd8fcf4a59bb22ef5c52b99242 SHA-1: 585ae5d6f2933b22415fa1f4347c691256606f9c SHA-256: c4d395ed2e79889d132baa9311b033d28f1d2cb8787b9683f27de973933b6454

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'https://dafemum.ru/strik', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to household appliance maintenance.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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://dafemum.ru/strik?utm_term=how+to+put+water+in+a+rowenta+iron
- http://dikoxikikalonib.scienceontheweb.net/bosch_classixx_washing_machine_manual.pdf
- https://magirodimape.weebly.com/uploads/1/3/1/6/131637482/jujemulopazemak_pupido_lazuropobuvab_gided.pdf
- http://sunny-web.ru/is_there_2_allegiant_movies1fx1g.pdf
- http://zikewexer.scienceontheweb.net/81079339119.pdf
- https://sujefamop.weebly.com/uploads/1/3/4/7/134762109/zukaxuwokavowuvego.pdf
- https://cdn-cms.f-static.net/uploads/4476011/normal_5fd3c9344097b.pdf
- http://kuworekokinig.medianewsonline.com/attack_on_titan_anime_wikipdia.pdf
- http://menbp.online/cheap_sheridan_sheets_online360sy.pdf
- https://cdn-cms.f-static.net/uploads/4414487/normal_6041b8cf64bd1.pdf
- https://mizewipexu.weebly.com/uploads/1/3/4/6/134609608/4416534.pdf
- https://bisitewo.weebly.com/uploads/1/3/4/4/134496646/bobewujegimi.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://rabelame.atwebpages.com/jelazupemo.pdf
- https://s3.amazonaws.com/zafijukopa/1411439895.pdf
- http://nibizuladode.onlinewebshop.net/poxidetafor.pdf
- http://tobikinos.onlinewebshop.net/accounts_and_finance_for_managers.pdf
- https://s3.amazonaws.com/tonemakopinibem/43442015287.pdf
- https://s3.amazonaws.com/sukedil/chernobylite_early_access.pdf
- http://gafijid.atwebpages.com/xuxagupemozaromabejuwaj.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e57d.bin` `965826496f0db50471d8d7a2fe78522b69354882cb4554428e24ef88177cc757`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE57D	4656 bytes
`font_01_sfnt_off0000f571.bin` `34b50632414cc685f076b17d35225a77f18be98c9b99f7b882a4ea704ef38ef8`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF571	10904 bytes

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