PDF malware analysis — malicious · aa87498e3d85d594

MALICIOUS

PDF

71.9 KB Created: 2021-09-19 06:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-07

MD5: 8f883508ce6120cc30fe63631eb3a8d3 SHA-1: 88feb5179133244002508ea9e6235bc7f975bd0c SHA-256: aa87498e3d85d594df7660b2496fd6982f393d8f0e662d5bbba32af892580654

156 Risk Score

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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://catamma.ru/uplcv?utm_term=pdf+hero+pdf+to+excel PDF link annotation
- http://ck-buhgalter.ru/userfiles/file/zawujotuxevit.pdfIn PDF document text
- https://zibarajabi.com/cache/fck_files/file/nidevivifetekojiritonen.pdfIn PDF document text
- https://fortworthdental.net/cmsCart/upload/file/matofufedurorexi.pdfIn PDF document text
- https://unitytradefze.com/ckfinder/userfiles/files/53248202514.pdfIn PDF document text
- http://dastone.ru/userfiles/file/basebanap.pdfIn PDF document text
- https://queensflower.nl/clientfiles/38199748770.pdfIn PDF document text
- https://devcons.org/uploads/userfiles/files/52784233881.pdfIn PDF document text
- http://ed-union05.ru/files/file/39836344032.pdfIn PDF document text
- http://skupka54.ru/upload/m/41007608729.pdfIn PDF document text
- http://bankerz.in/qpic/files/41946922121.pdfIn PDF document text
- https://xuanhongkhang.com/upload/files/28117618246.pdfIn PDF document text
- https://rsvforum.com/userfiles/file/46612511540.pdfIn PDF document text
- https://rireenfrance.com/images/upload/files/7231346615.pdfIn PDF document text
- https://12tiga.com/contents/files/82352850850.pdfIn PDF document text
- http://abwjefferson.com/uploads/files/papomulegovib.pdfIn PDF document text
- https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d96b0f1e75b997cdc0470b131b766360/21861251410.pdfIn PDF document text
- http://musikpark-live.de/userfiles/file/29990663726.pdfIn PDF document text
- http://www.mousumibanerjee.com/fckimages/file/sipav.pdfIn PDF document text
- https://pottoka.info/files/galeria/files/gaparafa.pdfIn PDF document text
- http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613910b0b0d6b---53796703042.pdfIn PDF document text
- https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161449e0903712---19724004272.pdfIn PDF document text
- http://abyss.sk/userfiles/file/zibuwopejudasibelimenunid.pdfIn PDF document text
- http://sziazsauto.com/uploads/files/48842482812.pdfIn PDF document text
- http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5cab84874---loweni.pdfIn PDF document text
- https://aawyx.com/sites/default/imageuser/file/31773904045.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_off0000b8f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB8F6	16368 bytes
SHA-256: `2ae9eb94ef66d57c9c764369f90262883e929bd6da48d484834c39c6beb31d17`
`font_01_sfnt_off0000e2e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE2E3	10296 bytes
SHA-256: `6e440fcc954210760ec2f433406357c0a513695d34fb53e194d889ade3d93457`
`font_02_sfnt_off0000fa30.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFA30	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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