PDF malware analysis — malicious · 9079b4856eec9466

MALICIOUS

PDF

84.5 KB Created: 2021-09-08 10:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 1c6e1035af4f7088fcadcdd323b6e1b9 SHA-1: 0f6f7d7d0a66574c612c0ff8a6b6bfc2de94d590 SHA-256: 9079b4856eec94667e19bc720f2a8cbaa38f74b6aeeca09a1a9cefc8f34f2319

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to various websites, including those hosted on compromised CMS platforms. The primary attack pattern involves directing users to potentially malicious external sites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9912

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 http://kapsalonindex.nl/images/uploads/91693184183.pdf In PDF document text
- http://kolasinprevoz.rs/slike/files/77201631244.pdfIn PDF document text
- http://iaestedresden.de/userfiles/file/kozegadabami.pdfIn PDF document text
- https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074ae194ce85---20131147794.pdfIn PDF document text
- https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/5dcdc50ad4e6cd2719c0689c607a6ade/zubizanunotadoxerup.pdfIn PDF document text
- https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/91tg86fqnldoatfr0u9fmr0agf/67885251991.pdfIn PDF document text
- https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d9b0867896859b764d2432280c6cb2dd/43248090248.pdfIn PDF document text
- https://dpengineers.info/admin/userfiles/file/retamumutitoxog.pdfIn PDF document text
- https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/jtdbjp7q6rhhiv20rumkt2i0kh/figudagak.pdfIn PDF document text
- http://allamericannursing.com/userfiles/file/10149161151.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7e44cfeda---15672554642.pdfIn PDF document text
- http://smartraoptics.com/fck_filemanager_upload/file/sitoweragufipar.pdfIn PDF document text
- https://stratasphere.online/userfiles/file/fepav.pdfIn PDF document text
- https://baongochoa.com/upload/file/wediraligidepaluvifi.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/b55cfbda9d5c8b2183af721d4f4ca08d/wolugixati.pdfIn PDF document text
- https://duext.com/wp-content/plugins/super-forms/uploads/php/files/abe2568867c9cf26cef380c6684dcd40/44275297652.pdfIn PDF document text
- http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fb432d6fd---kivuvigezimesobos.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9d678d5a7d066d9f44f1c0ab38e252f8/ziwobupe.pdfIn PDF document text
- http://eternoohydro.com/d/files/93294953388.pdfIn PDF document text
- http://svazekobciorlice.cz/userfiles/file/52778017047.pdfIn PDF document text
- https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/9gej3o0q8oi152e1b2rpncglq6/38774178589.pdfIn PDF document text
- https://kcharp.com/ckfinder/userfiles/files/velemu.pdfIn PDF document text
- https://www.sudoku-cool.com/ckfinder/userfiles/files/51034366049.pdfIn PDF document text
- http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/bf5fdf9c4fef51870a39537c2516a007/5352122421.pdfIn PDF document text
- http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/53019875819.pdfIn PDF document text
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ui15008keiu61vagh3p0016ldj/sezigemuvumowudanen.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=convert+multiple+images+to+one+pdf+filePDF link annotation
- 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_off0000e4d4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4D4	17712 bytes
SHA-256: `508891c2f004cbfedc8b5d882a2e45545d9d140308e0616d41e96c5ac5ab499d`
`font_01_sfnt_off00011277.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11277	11036 bytes
SHA-256: `4beaa9353009cdcf822648e0ab29f048dfeee382ada81405debaa227e1e9620c`
`font_02_sfnt_off00012bf8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BF8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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