PDF malware analysis — malicious · 3140759ed2ba1295

MALICIOUS

PDF

78.0 KB Created: 2021-03-31 04:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 1abced4d09aab9ccef0dc79a886570ce SHA-1: 79ee97308950cd5b10227637a3f159740031b443 SHA-256: 3140759ed2ba129541f30b009ad273b2fb135a6995151898963062b55f0783fd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one pointing to a suspicious domain 'vilenefex.ru', suggesting a lure for users to visit potentially harmful sites. The PDF structure also indicates a link farm, further supporting the malicious intent of distributing traffic to external resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

Heuristics 5

Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://vilenefex.ru/123?utm_term=capital+contribution+reserve+balance+sheet
- http://dotenipago.medianewsonline.com/mupinimijopirakarixepi.pdf
- http://xovijezup.mywebcommunity.org/61184478587.pdf
- http://bulibujirifubof.scienceontheweb.net/alternity_dataware.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- https://s3.amazonaws.com/ganubifirigevi/38634561568.pdf
- https://uploads.strikinglycdn.com/files/b9b74e68-be2f-483a-a156-5bc47e44ecae/10755114899.pdf
- https://s3.amazonaws.com/pibajuwi/california_king_size_bed_sheets_online_india.pdf
- https://s3.amazonaws.com/sorapobuk/90686634757.pdf
- http://bopiguxa.atwebpages.com/72806126755.pdf
- https://s3.amazonaws.com/dumupa/caremark_prior_auth_form_for_adderall.pdf
- https://uploads.strikinglycdn.com/files/8ee2a10e-ab4d-4be8-9272-344ded1ef336/55597570961.pdf
- https://s3.amazonaws.com/numegubowalonan/msc_business_informatics_germany.pdf
- https://uploads.strikinglycdn.com/files/038c69bd-e57f-4c91-a321-14f7fe1cd43d/5_ejemplos_de_estilo_directo_e_indirecto.pdf
- https://s3.amazonaws.com/lomogas/pidofo.pdf
- https://662517ce-f374-4037-aebd-99b1dbe00103.filesusr.com/ugd/0c4177_3e17eb3d653b4047a1b35d32bd4d78c2.pdf?index=true
- https://s3.amazonaws.com/wexukufedepim/commando_sniper_game_apk.pdf
- https://s3.amazonaws.com/zolerazowubow/free_newborn_photography_posing_guide.pdf
- https://3c86e5df-9a55-47dd-9d5b-c207b25ec6cd.filesusr.com/ugd/72bf36_59ab34ec5cbd4d29a7781dcb95d0ffc4.pdf?index=true
- https://s3.amazonaws.com/seriposuj/speedometer_theme_for_android.pdf
- https://s3.amazonaws.com/retisovojor/vebebirane.pdf
- https://uploads.strikinglycdn.com/files/b43543f1-8deb-4141-840d-dd9eb78e7bba/57740311221.pdf
- https://s3.amazonaws.com/fadedosi/56884466627.pdf
- https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_767174978122436e8f88a529ca1ae5a9.pdf?index=true
- https://uploads.strikinglycdn.com/files/2c71c41d-2022-44e2-a4fb-27526f3fe024/how_to_work_a_dressmaker_sewing_machine_brother.pdf
- https://s3.amazonaws.com/ganubatebedoxez/jubovuratexobupa.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_off0000f21c.bin` `d03c34dac0dfcc72b842644a2026fd8600a47895f813af392ee8ed5eb2c00f0d`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF21C	5128 bytes
`font_01_sfnt_off00010380.bin` `614d35e76e223ecb82ae68abf289142da298963919de2777ed7a472f99736cce`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10380	11340 bytes

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