PDF malware analysis — malicious · 88e89308d0da37bf

MALICIOUS

PDF

81.7 KB Created: 2021-06-28 23:28:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13

MD5: 40b5c258a124f071a3ab3e7529f1d904 SHA-1: fd82cc4606380cbd34a159cc8fd14ff0c10979ae SHA-256: 88e89308d0da37bf4cc580024ce0c78b711e2268e0d4ad494cbdf7911fa57bbb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous external URIs and link farms pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the overall structure and URL patterns indicate a malicious intent to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://crysiq.ru/uplcv?utm_term=how+network+works+pdf PDF link annotation
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/25c6eb86fa01de12e44ee327ac7598bc/vuwemif.pdfIn PDF document text
- http://imi.vc/upload/files/85596980163.pdfIn PDF document text
- https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/cb2ba79c56afae5223494f0e0c85ac69/36227648562.pdfIn PDF document text
- https://ultralloy.net/upload/files/fuxepibezomaruwulufav.pdfIn PDF document text
- https://childconcern.in/trila/userfiles/file/76308813156.pdfIn PDF document text
- https://pui-vital.ro/msg_media/file/84802445568.pdfIn PDF document text
- http://bainihu.com/upfiles/editor/files/potoza.pdfIn PDF document text
- http://beateromer.com/bilder/file/60359534420.pdfIn PDF document text
- https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee7b87106---mufisubitikifusimenavale.pdfIn PDF document text
- http://aeronautike.com/userfiles/file/lagezuselapatipaw.pdfIn PDF document text
- https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/eqsgqdm2di9kp68lecc0mhsh1s/48309504789.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/09c84c7581d5a262f813ab385ff5a7a4/54008890393.pdfIn PDF document text
- http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608494bb98816---51125336409.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d85eaf9bdee---doluporasenakunufaxujiwas.pdfIn PDF document text
- http://aptchasers.com/FCKeditor/userfiles/file/busevozafumalokojenefofi.pdfIn PDF document text
- http://asea-admin.com/_userfiles/file/20210523084516.pdfIn PDF document text
- https://hiddencliff.kr/FileData/ckfinder/files/20210616_EF35CE9BBE236D09.pdfIn PDF document text
- https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/49a7f2143a96d523438a2a6c482cab9a/lufoxesoxulibofajudeli.pdfIn PDF document text
- http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0dff1f5e7---26882119756.pdfIn PDF document text
- https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/jovol597sj2r7hnrh3uji8urel/sekadixetobona.pdfIn PDF document text
- https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/99d8d0cfd51b4dc4795b889b68016158/68164373575.pdfIn PDF document text
- https://open-call.fr/uploaded/files/29041192510.pdfIn PDF document text
- https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/b9d7a18ff98184f71636b88a18b61d7c/pojenunanopatotejawi.pdfIn PDF document text
- https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/336a6d06bc725d0ff1f59132d4e20727/xavokewafawa.pdfIn PDF document text
- https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/af60b914e1237dced1b75942d1dee008/15430720155.pdfIn PDF document text
- https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac49ff37e13---60534303324.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_off0000df49.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF49	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f760.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF760	10360 bytes
SHA-256: `f5d9e85e57f60875969263c69af6118e47ce5cb93d38d979c082239b9331a511`
`font_02_sfnt_off00010eec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10EEC	16484 bytes
SHA-256: `bc6ffbfaac965096349ad040f9ca539f6b345249528fd91f67ab01e4a85de17e`

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