PDF malware analysis — malicious · 2d1ba5534e6cc15f

MALICIOUS

PDF

72.3 KB Created: 2021-09-24 19:07:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 0e8c9c4d5bea3267db949a88fd573bce SHA-1: ed1d81ddf8ca8501995254f74c8cb029389a454b SHA-256: 2d1ba5534e6cc15f9e2a08905efcd01e2d7c3278ed5050c1f0e968e588e3f375

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The 'SE_CALLBACK_LURE' heuristic strongly suggests a callback phishing or tech-support scam, where the document prompts the user to call a phone number. The presence of numerous external URIs, many pointing to disposable hosting, further supports a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the overall structure and heuristic firings point to a phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9915

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Callback phishing phone lure medium SE_CALLBACK_LURE

Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
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://pixomot.ru/uplcv?utm_term=how+to+get+free+robux+without+email+or+phone+number PDF link annotation
- http://robbes.nl/media/files/petetewesalovowopisuxiso.pdfIn PDF document text
- http://www.prodomasa.com/ckfinder/userfiles/files/16048274973.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161335fefeb7b6---62974311587.pdfIn PDF document text
- http://qazaqbanki.kz/data/content/files/lepomudowomijubifexunul.pdfIn PDF document text
- http://silverspringabw.com/uploads/files/bizurusupegidetofuko.pdfIn PDF document text
- http://mimarkamilozkartal.com/userfiles/files/tizagaterenipajadumis.pdfIn PDF document text
- http://proallprint.com/userfiles/files/51479973353.pdfIn PDF document text
- https://atkarisuli.hu/userfiles/file/nepew.pdfIn PDF document text
- http://bassonconsulting.mc/userfiles/file/lifovupebema.pdfIn PDF document text
- http://fusiongrup.ro/userfiles/file/73172698122.pdfIn PDF document text
- https://jewfri.kr/files/image/files/puboripikefivipuli.pdfIn PDF document text
- http://cnsgafgl.netsociality.com/upload/files/kewafilupawu.pdfIn PDF document text
- https://alstar.uz/images/shared/file/jotolavukuvawuvumu.pdfIn PDF document text
- https://www.ebenisterie-burette.com/ckfinder/userfiles/files/safusitaxalemigo.pdfIn PDF document text
- https://chorland-dining.com/webroot/editor-uploads/files/betikurewokurikodepejut.pdfIn PDF document text
- https://www.andreivieru.com/ckfinder/userfiles/files/fagivaxaveja.pdfIn PDF document text
- http://brkvinc.com/userfiles/file/tidutezapejegitu.pdfIn PDF document text
- http://irinaburmistrova.ru/files/kijuxozediregunudopigov.pdfIn PDF document text
- http://kondicionery-himki.ru/upload_picture/file/jatelinevame.pdfIn PDF document text
- http://lineshare.net/upload/files/20210913210225.pdfIn PDF document text
- http://newtarrytowndeli.com/uploads/files/gusewunademunobumejuzaruk.pdfIn PDF document text
- http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b276ad7c96---misanogutuvotadusavurek.pdfIn PDF document text
- https://shoppingplanet.ro/ckfinder/userfiles/files/16946729003.pdfIn PDF document text
- http://coyada.com/up_images/up_images/jenabi.pdfIn PDF document text
- http://gbfrjournal.org/pds/userfiles/files/28322785342.pdfIn PDF document text
- https://movimientofamiliadejesus.com/images/uploaded/file/samabemamoxupasibimuv.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b6df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB6DF	16984 bytes
SHA-256: `3e44a3f233ac59d7b416d4b6457904e598375185a7dbbac2e0255b614873e2a6`
`font_01_sfnt_off0000e190.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE190	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f9a7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9A7	11056 bytes
SHA-256: `7af9390f8b65489a0e4143883bfe88bab8f862bcfc0150376fe5aabeffda6573`

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