PDF malware analysis — malicious · 96a5758487afcf12

MALICIOUS

PDF

74.8 KB Created: 2021-09-25 12:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 25d0386285d3450e73e630b4fc5c1cac SHA-1: cc16092ef6010f034814fb8a6d7ac9e8cd86fdc7 SHA-256: 96a5758487afcf12318a75bcfc6cc41773bb7eb312351ee235e20acfd277f427

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs that form a link farm, pointing to compromised WordPress sites and other domains, suggesting an attempt to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://queure.ru/uplcv?utm_term=action+thriller+movies+full+length+english PDF link annotation
- http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1614ee78614ed4---93347906500.pdfIn PDF document text
- http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613f241a3eb8d---sawamilinoberejozazamu.pdfIn PDF document text
- http://sk4education.com/ckfinder/userfiles/files/5410094459.pdfIn PDF document text
- https://burgaseguros.com/userfiles/file/logupujisemuke.pdfIn PDF document text
- https://hideab.se/tc/Mediagalleri/file/27192981187.pdfIn PDF document text
- http://cobweb.janci.net/upload/files/25697147634.pdfIn PDF document text
- https://ans5680.preneed91.com/upload/files/87655374954.pdfIn PDF document text
- https://hatinhjobs.com/upload/files/30814790334.pdfIn PDF document text
- https://nevisnews.com/userfiles/62848512431.pdfIn PDF document text
- https://uleshuzataruhaz.hu/files/file/95177089008.pdfIn PDF document text
- http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/161486655571ce---69370063009.pdfIn PDF document text
- https://fsbulletsandbrass.com/userfiles/files/56361850800.pdfIn PDF document text
- https://netcsemege.hu/ckfinder/userfiles/files/xodewokokimil.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ecf994b2ed---jidiparoparanegexonuk.pdfIn PDF document text
- http://www.toptehnik.si/images/vamegitevejoz.pdfIn PDF document text
- https://narellesastro.com/userfiles/files/7822707870.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/8690c9d751c4ef4b8521dafcac912b13/91386620557.pdfIn PDF document text
- https://cornerstonelaw.eu/userfiles/file/gogexa.pdfIn PDF document text
- http://www.anapharmata.hu/ckfinder/core/connector/php/files/gugipibi.pdfIn PDF document text
- http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c4e35e84fc---pitabirokubudemakokovun.pdfIn PDF document text
- http://ecoaga.com/documentos/file/fewolikereruwus.pdfIn PDF document text
- https://www.truck-transport.com/ckfinder/userfiles/files/kexanufobokabagotikagabak.pdfIn PDF document text
- http://ebiocell.com/uploadfile/file///2021091315181388.pdfIn PDF document text
- http://phunggia.biz/userfiles/file/46664287554.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_off0000b7d6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB7D6	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cfed.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFED	10768 bytes
SHA-256: `a9deb20213d8f20b81bb5ed387cffd1ccd56c3e681f572bc2e833afa4315411c`
`font_02_sfnt_off0000e896.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE896	20428 bytes
SHA-256: `14c85c83104e8b482a944de23abbaa8ac65b54c4b8b6efe3bc1c8355138d34f8`

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