PDF malware analysis — malicious · 468a1cca93dc6fca

MALICIOUS

PDF

77.3 KB Created: 2021-09-16 23:13:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 3a4c18fe15216b5febd5b1cdd37aa27c SHA-1: 927d9ca26f633ba3d37c62bb520f4a1fd889de9a SHA-256: 468a1cca93dc6fcaa3831a7280b15efb78a4fcde073f745fdc837742552af416

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URIs pointing to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of multiple malicious URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic point towards an attack pattern designed to redirect users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9973

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
Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL

PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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.
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://smidgel.ru/uplcv?utm_term=increase+my+insta+followers PDF link annotation
- http://gamaxmotor.cz/data/dokumenty/77120804981.pdfIn PDF document text
- https://unifor975.ca/userfiles/file/solurizozumux.pdfIn PDF document text
- http://bukharaatlanta.com/sites/default/files/file/50709022945.pdfIn PDF document text
- http://xageunion.com/userfiles/file/zedirekener.pdfIn PDF document text
- http://iburgisidimarsala.eu/userfiles/files/fubakelikotesisi.pdfIn PDF document text
- http://ingenermarket.ru/userfiles/81620413654.pdfIn PDF document text
- http://twgo8.com/uploads/base/files/202109160721056292.pdfIn PDF document text
- https://autoroman-service.ro/imagini_ws/sapiwaxetodateg.pdfIn PDF document text
- https://fallahi-sch.com/userfiles/file/91138022669.pdfIn PDF document text
- http://centroolosprato.it/userfiles/files/piwubepukekadeg.pdfIn PDF document text
- http://meetburgerusa.com/uploads/files/80000287000.pdfIn PDF document text
- http://travel-door.com/userfiles/file/gurebiwepu.pdfIn PDF document text
- http://elskup.pl/images/assets/file/kojoramix.pdfIn PDF document text
- https://netron.pt/app/webroot/media/files/31301129690.pdfIn PDF document text
- http://faw-asia.com/image/upload/files/55083678589.pdfIn PDF document text
- http://millecolori.it/images/file/wijajubixuwomijuk.pdfIn PDF document text
- http://igigeothermal.jp/userfiles/file/waxesesuwemefilugibe.pdfIn PDF document text
- http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/66611278938.pdfPDF link annotation
- https://www.domaine-de-la-ferme.fr/ckfinder/userfiles/files/30725108629.pdfIn PDF document text
- http://karthikeyanjayaram.in/userfiles/file/16401545775.pdfIn PDF document text
- http://ormansagszive.hu/upload/file/49973038837.pdfIn PDF document text
- http://kochamsushi.pl/UserFiles/file/51478139741.pdfIn PDF document text
- http://lmleadmanagement.com/userfiles/files/jazubekigowom.pdfIn PDF document text
- http://reanda.com/jingkelun/userfiles/files/20210904153139.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_off0000ca14.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCA14	17264 bytes
SHA-256: `1da2414a228123bca9bd512156203426d5bccf19909e8f094d4beea7fdcd1709`
`font_01_sfnt_off0000f6cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6CD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010ee4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EE4	10648 bytes
SHA-256: `134825592a858f4c366564d40a18c672c3736f06cd417e1dd8ab234b95602053`

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