PDF malware analysis — malicious · f87bc4bb8111a884

MALICIOUS

PDF

98.0 KB Created: 2021-09-12 11:04:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-17

MD5: 200ce47277e1bf327a2b26863fc154a0 SHA-1: c5741328fbe98c81e19489b08d18dd0e5e85411d SHA-256: f87bc4bb8111a8844594a0a6f5f9b338fc0dae01d67ff145143e4fa3b462aa6b

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9961

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://choinka4x4.org/cms/files/file/losabugupazogawojad.pdf In PDF document text
- http://mazdooradda.com/userfiles/file/70897957795.pdfIn PDF document text
- https://asfus.net/virgsurv/userfiles/file/82907555205.pdfIn PDF document text
- https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d457bd1ec7dbb63872cb8d494ea89a02/52087348267.pdfIn PDF document text
- http://lachina.cn/upload/file/65357409829.pdfIn PDF document text
- https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613b19437fa3d---12171442673.pdfIn PDF document text
- http://2990592.ru/ckfinder/userfiles/files/49314469522.pdfIn PDF document text
- http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/86012452802.pdfIn PDF document text
- https://copab.tn/216mag.svn/uploads/files/jewut.pdfIn PDF document text
- https://eghamatkade.com/basefile/eghamatkadecom/files/borejidegi.pdfIn PDF document text
- https://fratellifurloni.it/file/gozirug.pdfIn PDF document text
- https://partnyor.az/userfiles/file/laxemulisetewefu.pdfIn PDF document text
- https://vidaleve.net/ckfinder/userfiles/files/mikojotaxutufeperitamonam.pdfIn PDF document text
- http://jinwoosmc.com/userfiles/file/94792857985.pdfIn PDF document text
- http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16130ca80f3eb0---96338405351.pdfIn PDF document text
- https://www.delaneyllc.com/ckfinder/userfiles/files/96029343191.pdfIn PDF document text
- http://mixline.ru/img/lib/file/nuzeruxakeripibebiw.pdfIn PDF document text
- https://energiadirect.pl/application/resources/ckfinder/userfiles/files/bakuxuxabixirig.pdfIn PDF document text
- http://epicridesnepal.com/files/98520950960.pdfIn PDF document text
- http://mvpbuilding.com/userfiles/file/63254206161.pdfIn PDF document text
- http://fszhenjia.com/upfolder/e/files/20210910125747.pdfIn PDF document text
- https://eco-translation.ca/upload/editor/file/4502005880.pdfIn PDF document text
- http://exosportsante.fr/ckfinder/userfiles/files/68654964195.pdfIn PDF document text
- https://gmt-tw.com/app/webroot/userfiles/files/guvikeponiroj.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=one+flight+over+the+cuckoo%27s+nest+pdfPDF 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_off00011519.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11519	11052 bytes
SHA-256: `e1b77fbe47c22c6dd1c51a7dd1a936a477ed5d03409e7523ccfa7b20129c1589`
`font_01_sfnt_off00012eac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12EAC	19384 bytes
SHA-256: `76b2579b0268d1a3037fafbe9901a213b379ed6c25cb2fd4e444da30e0e6c69c`
`font_02_sfnt_off000161a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x161A3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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