PDF malware analysis — malicious · f6e4295da597c4aa

MALICIOUS

PDF

75.6 KB Created: 2021-09-27 14:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 22dade4ce06a5d7bc47a75933fe89343 SHA-1: 1dabec9afd3007a27277970c06a3e241ff7a54b7 SHA-256: f6e4295da597c4aafe9778ff897f9a9250ca3269e02e304d2dc5e00614b5d610

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to facilitate initial access, likely through spearphishing.

Machine Learning

Nyx PDF Classifier malicious score 0.9908

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
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://infrive.ru/uplcv?utm_term=root+oppo+cph2083 PDF link annotation
- http://funkyspa.net/ckfinder/userfiles/files/77835061620.pdfIn PDF document text
- https://jaurrieta.net/USERFILES_JAURRIETA/files/79444855162.pdfIn PDF document text
- http://househouse.it/userfiles/files/26405366144.pdfIn PDF document text
- https://latgalesamatnieki.lv/files/file/49126568444.pdfIn PDF document text
- http://chothuexeninhbinh.net/data/dulieu/files/66773354776.pdfIn PDF document text
- https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/58138p6684bntdfqlerf83lr6t/besowufab.pdfIn PDF document text
- http://star-transform-moscow.ru/uimg/files/34143586290.pdfIn PDF document text
- https://perfecthospital.org/ckfinder/userfiles/files/dekasefe.pdfIn PDF document text
- http://bharatdarshan.net/rgroup/ckfinder/userfiles/files/92567284894.pdfIn PDF document text
- http://snap-drone.com/userfiles/file/xosasoximumunevunesezovu.pdfIn PDF document text
- http://easternhoteljeju.com/FileData/ckfinder/files/20210901_627C2588D2CA96FD.pdfIn PDF document text
- https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614796729feba---vabogeki.pdfIn PDF document text
- https://dukumanis.com/contents/files/68828613778.pdfIn PDF document text
- https://thinkglobalcompliance.com/ckfinder/userfiles/files/8171949643.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fea7b5c78a---11747357292.pdfIn PDF document text
- http://osoboebludo.com/ckfinder/userfiles/files/26825336722.pdfIn PDF document text
- http://beming.com/ressource/site-image/files/taxaviwigezanulerofevaf.pdfIn PDF document text
- http://dep14kirov.ru/userfiles/file/wozutuzuwufemimeretofer.pdfIn PDF document text
- https://xistenze.nagydavid.com/files/files/bomutikezakap.pdfIn PDF document text
- http://abarappresentanze.it/userfiles/files/58032688041.pdfIn PDF document text
- http://zlhk.ru/upload_picture/file/27732493553.pdfIn PDF document text
- http://stressmanagement-karriere.de/userfiles/file/metimaxunezogar.pdfIn PDF document text
- http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/zewilojudefenorepof.pdfIn PDF document text
- https://agronlogistics.com/userfiles/files/55340092869.pdfIn PDF document text
- https://triyoga-tv.ru/userfiles/file/xubuxafonizasibufamomukul.pdfIn PDF document text
- http://sportservistocik.cz/UserFiles/File/jijukuvixojekukala.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_off0000bf0f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBF0F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d726.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD726	10336 bytes
SHA-256: `c3bb455db14ccc9f5d2269e997c3f906ca156cce200250626a61ea33a49e639b`
`font_02_sfnt_off0000eea8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEA8	18984 bytes
SHA-256: `bf9501648ac7e293011c5ba61f31f3836d408a321689472dc1ac621449846943`

Open this report in the interactive analyzer, or submit your own file for analysis.