PDF malware analysis — malicious · 3990d172331b1a09

MALICIOUS

PDF

169.7 KB Created: 2021-07-25 15:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)

MD5: 0fcc54f7a5bf928c346995cc0034f84d SHA-1: 2bff14611884338598c178a049e74d0c707f8954 SHA-256: 3990d172331b1a097005366b9e07a214d7ab806dd3133281f26276352b89385e

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a lure for users to download a password-protected archive. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to facilitate the download of a secondary payload, likely through a social engineering pretext.

Machine Learning

Nyx PDF Classifier malicious score 0.8224

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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
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://urgentcarepb.net/userfiles/file/fugibenobumaki.pdf
- http://amadpich.com/userfiles/file/62423635828.pdf
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16082919e1917b---tigudup.pdf
- http://utpcomp.ru/uploads/files/28656657276.pdf
- https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/b0f88891ce732fe5585b12dc8097a2b3/pisodalunukexes.pdf
- https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1f2e1671b---17024850659.pdf
- http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/144163bf83f1f1f084cdfb140f77b13e/repemifitilatewupipi.pdf
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7cd5b0bb0b4acc3d65838fda984f6950/xapumufabipogitufir.pdf
- https://cissud.com/uploads/ck_editor/files/48204216603.pdf
- http://premiercontractinginc.com/files/file/kozat.pdf
- http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160e7a5233e9a3---3728813929.pdf
- https://subarini.ro/mm/file/perufokalab.pdf
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b26dcb4e0bb---kufudasajaturi.pdf
- http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d73dfa991f8---1045902732.pdf
- http://lineshare.net/upload/files/20210623080908.pdf
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083a687698c4---doxolako.pdf
- https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/5edaaca0f7beb55d6a4a1e164615e8b3/34602570968.pdf
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7b40f1c2eb---tokeniwapibegax.pdf
- https://ambientltg.com/wp-content/plugins/super-forms/uploads/php/files/5b4b9e76e0434b54b4d623b243b98856/85095991548.pdf
- http://haciogullari.com/depo/sayfaresim/file/77545067112.pdf
- https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/624bd8c1e9772a1a7698332622cff397/wizowibovidewesigakesa.pdf
- http://alexhofford.com/temp/files/file/87293378322.pdf
- https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=kali+linux+tutorial+ethical+hacking
- http://dejavu.sourceforge.net
- http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00022c61.bin` `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x22C61	16792 bytes
`font_01_sfnt_off00024473.bin` `19ba2f2d6aff5ae00908993de7bfe25b074554142d4137a8a27c70a0701ed76a`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x24473	17696 bytes
`font_02_sfnt_off000272fa.bin` `3754b01bdf64372879d9392ff478b58e9a6410faea60abfd9c4ce3522bd0afe9`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x272FA	10624 bytes
`font_03_sfnt_off00028b3b.bin` `74ea40c6abafff908ba0a862ebf25ee1d47d31f530ca964bdc695191fb21b084`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x28B3B	16116 bytes

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