PDF malware analysis — malicious · 06cab576b6c3f5f3

MALICIOUS

PDF

86.5 KB Created: 2021-08-08 07:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 4de0f518a664b2978a77483f4cd9b1af SHA-1: a2e18e3c9d7ac9f0382d0cf71516b61bab5fc0b9 SHA-256: 06cab576b6c3f5f3197fd4f31d540162ec507d08006ef84300fee417e5cededa

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on compromised WordPress sites and disposable domains. The embedded URLs suggest an attempt to redirect users to malicious content or phishing pages.

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 https://infrive.ru/uplcv?utm_term=aidin+salih+son+s%C3%B6z+kitab%C4%B1+pdf PDF link annotation
- https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/68262fb7f456a42c9c8bf38363e2182a/rudezozipurovudujumep.pdfIn PDF document text
- https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/f0c37b03ddbfec0af8516d94a2087985/vutugifisiruwiroxoxududox.pdfIn PDF document text
- http://446888.top/userfiles/file/7200216698.pdfIn PDF document text
- https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2e202d04e---10501113986.pdfIn PDF document text
- http://holzbau-napetschnig.at/13198354957.pdfIn PDF document text
- http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c84b1fde6---65271100617.pdfIn PDF document text
- http://emekyesiltepe.net/images_upload/files/8359842550.pdfIn PDF document text
- https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/53661fd0a5e1ed59a0ac46cd5da3d4a4/gunupavaladirelu.pdfIn PDF document text
- https://digireg.ch/upload/leruzewogapozagaxorewip.pdfIn PDF document text
- http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608acad99dcf9---30959710327.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/30sa2s1qot939ir7i6l8ts4865/6417446127.pdfIn PDF document text
- http://falegnameriacastiglione.it/userfiles/files/8454712372.pdfIn PDF document text
- http://zpb-maciejewski.pl/upload/fck/file/41981918225.pdfIn PDF document text
- http://abnicum.com/files/file/bataral.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/hgd30v2pdvsc6avarnj37j3ed5/35789306418.pdfIn PDF document text
- https://luminex.pl/upload/file/42045719287.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a210ce6bd58---punejilox.pdfIn PDF document text
- http://wtmongolia.com/materials/file/dovukuruxamosul.pdfIn PDF document text
- https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/a7f5e36d415488075313a2571b955ec2/batewobediborafibosirorun.pdfIn PDF document text
- http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdb4fc13f6---tavawibubojek.pdfIn PDF document text
- https://auto-rujo.com/images-editor/file/70026833963.pdfIn PDF document text
- https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/c070f1efe1348f314abb12da0378b278/56619396590.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860b5d2bc4d---kusogiruwiwitug.pdfIn PDF document text
- http://kukubara.com/zdjecia/file/52307587218.pdfIn PDF document text
- http://crystalsteakandstogie.com/clients/1/1d/1dbb6d5698303b6304ae84622e226a19/File/94995277055.pdfIn PDF document text
- https://securityguardsupply.com/php/uploads/file/37734447715.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/2rqb9rh8kt5e8df441vhng8ig6/22110794238.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_off0000e7c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE7C9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ffdb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFFDB	19796 bytes
SHA-256: `c68c444dd3121972c5dfc6e61ea46293f0487cb70f2b872221261aed47f70d8f`
`font_02_sfnt_off000130d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x130D2	10896 bytes
SHA-256: `ad4bbfb398d1e919c75ec15296107b7a873d614832b911b13b66cff003a6e5b3`

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