PDF malware analysis — malicious · f882cc8f3a90b9dd

MALICIOUS

PDF

75.3 KB Created: 2021-09-18 21:35:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 5fe8fa2f655939e74da237976ff522c1 SHA-1: 364de758aa57950a9cc50f54a3e200112573308e SHA-256: f882cc8f3a90b9dd3c4c2c087d53b03bf7c2b04e1788241838959ae51b40be1e

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The presence of external URI findings and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9948

Heuristics 7

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.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
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://laborke.ru/uplcv?utm_term=love+phone+screen+themes+color+flash+call PDF link annotation
- https://u15.ch/ckfinder/userfiles/files/vakijobonemenawasofu.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614382b8641c9---40439268340.pdfIn PDF document text
- https://widepolymers.com/userfiles/file/93251153249.pdfIn PDF document text
- http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/12543613437.pdfIn PDF document text
- http://cermak-expo.cz/data/files/file/48654114349.pdfIn PDF document text
- http://druckmaschinenservice.com/uploads/fce/files/30693534014.pdfIn PDF document text
- https://seikai.jp/free_images/files/susevopevebejijiti.pdfIn PDF document text
- http://rosesrealtyhomes.com/userfiles/files/pelujuwixiledawem.pdfIn PDF document text
- https://angel-juicer.com/FileData/ckfinder/files/20210904_9A4174EA83E5737D.pdfIn PDF document text
- http://cbcom.fr/ressource/site-image/files/joxexadazusujowabaliraxi.pdfIn PDF document text
- http://unitez.net/images/newtech/files/bererutametogugetefobimud.pdfIn PDF document text
- https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c039c54acd---vivomirimopuxesonaketonu.pdfIn PDF document text
- http://articolo17.it/siti/usr/foto/files/jujakakupukegedaned.pdfIn PDF document text
- https://mannerfeltdesignteam.se/ckfinder/userfiles/files/93613826000.pdfIn PDF document text
- http://1night2daytour.com/ckupload/files/julotimebu.pdfIn PDF document text
- https://costabravas.com/uploads/localidades/files/33222488301.pdfIn PDF document text
- http://rydelko.pl/userfiles/file/23538874320.pdfIn PDF document text
- https://underworldgear.com/upload/users/files/47277590306.pdfIn PDF document text
- https://m-astar.com/UserFiles/files/82618238908.pdfIn PDF document text
- http://tacchigroup.com/public/thread/risorse/file/zagugabirovad.pdfIn PDF document text
- http://itcck.org/upload/editor/file/98074879213.pdfIn PDF document text
- http://119pump.net/d/files/dubirufatab.pdfIn PDF document text
- http://agcslohian.com/userfiles/file/munigemepopevobekaneruvup.pdfIn PDF document text
- https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/161319ed47b79c---13240665893.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_off0000c058.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC058	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000d86f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD86F	10676 bytes
SHA-256: `e7b8cc54817b3e7cdd44669fc15bfe303e7c2b144eb1da71de7b35134986ec07`
`font_02_sfnt_off0000f0c4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF0C4	17860 bytes
SHA-256: `c28f8965f1981302ad721ee5204851a80958fc5d08320da5e01b632fbd2b98b0`

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