PDF malware analysis — malicious · 60c92bc90d416679

MALICIOUS

PDF

86.1 KB Created: 2021-09-01 09:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 371f1338604cf7b228e60e4771df31d3 SHA-1: 2b2bae7ae5559a51084e50c0e6689dfe1faa3365 SHA-256: 60c92bc90d416679799733c131be7f6f78e64c2f4973e12f24f7db26d4ca1f9e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external URIs and is identified as a link farm, with many links pointing to other PDF files hosted on various domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links. ClamAV detection and ML classification confirm the malicious nature, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9957

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://crysiq.ru/uplcv?utm_term=cyberpunk+2077+apk+obb+for+android PDF link annotation
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/16107a2187dee8---46789908566.pdfIn PDF document text
- https://oddluzanie.net/userfiles/file/dagixunotagan.pdfIn PDF document text
- https://stradatextiles.com/upload/ckfinder/files/rilefe.pdfIn PDF document text
- https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/5df1130a8f97be37aa71a0c69c42ce43/ximosudugulomajuzemepufip.pdfIn PDF document text
- http://ypdtools.com/ckfinder/images_store/files/91010304452.pdfIn PDF document text
- http://veterinariogiardinelli.it/userfiles/files/zijosixet.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f460c780f32---46871201797.pdfIn PDF document text
- http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7d03aba38---tarevirumivisivevorufape.pdfIn PDF document text
- https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/48f67a8aa56ef4a558c00a6f11272fcd/lelijavisaxagimejekuberow.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607046bc5e659---47072045859.pdfIn PDF document text
- http://riph.pl/userfiles/file/tijinegazonexar.pdfIn PDF document text
- http://preserveproperties.com/userfiles/files/silogapowazefozenuzul.pdfIn PDF document text
- http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8f5ed9ea4---nutuziwitiju.pdfIn PDF document text
- https://abe-rdc.com/userfiles/file/1316968065.pdfIn PDF document text
- http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610596b376f63---79959243494.pdfIn PDF document text
- http://barexkft.hu/userfiles/file/sevefaki.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/63995d279027291276ffceac5136314b/42318339188.pdfIn PDF document text
- https://dongphuchuytai.com/upload/files/nobofenakorelet.pdfIn PDF document text
- http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acc69d8507a---zozevowirebe.pdfIn PDF document text
- https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/117c5b06505b63da74ac85092bc00df5/supadawirebojofa.pdfIn PDF document text
- http://www.icf-plant.com/files/file/fisolaranovaxogepikexaril.pdfIn PDF document text
- https://unique-u.biz/images/uploads/file/55768408305.pdfIn PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086150b76976---26797587228.pdfIn PDF document text
- https://adreshosting.com/calisma2/files/uploads/kixiwelafupefeguwexituw.pdfIn PDF document text
- https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1f7262991---getuzaro.pdfIn PDF document text
- https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/a855dae5f068536e649ebc281f2845a1/pazeniwobeporoxa.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_off0000e90a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE90A	10948 bytes
SHA-256: `02fb0e4cc998fad9cced5deab86d04759bb40267000fbe4cb28ed58810279061`
`font_01_sfnt_off00010271.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10271	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011a83.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A83	18324 bytes
SHA-256: `c35fae387a38752a01df75755b9d8b172ab563d1a8d9c085bdcf42229cdfad97`

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