PDF malware analysis — malicious · 7bd64d22ddf9e66f

MALICIOUS

PDF

72.6 KB Created: 2021-09-05 13:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: ed344bbf012e9ac2ef13e6b6dab30389 SHA-1: 89b1b3fb2979e2a289990c4ddbbfe91627658242 SHA-256: 7bd64d22ddf9e66f0e63e94852be3c9809683cd0b49104de2e8d08defc285514

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised or disposable hosting domains. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9893

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://wasserentkalkung.at/ckfinder/userfiles/files/16184313894.pdf In PDF document text
- https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0b4a27e3a---20753699620.pdfIn PDF document text
- http://samafb.org/uploadfilefiles/mofilujunukozowebevodide.pdfIn PDF document text
- https://dichvumoinoi.com/ckfinder/userfiles/files/gogekudubewadopage.pdfIn PDF document text
- https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/g5u2qfpj6vr5kp86ihdfupvrbp/paturavaselefalopoz.pdfIn PDF document text
- https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/7e088d4e83f140a4819a211ca4498789/10411403869.pdfIn PDF document text
- http://rilta.net/userfiles/files/pipezigowuxiwekenadaduja.pdfIn PDF document text
- http://reanda.com/jingkelun/userfiles/files/20210603062132.pdfIn PDF document text
- https://semineebrasov.ro/printuri-fi/files/varudulilomuvulifajiwo.pdfIn PDF document text
- http://mariautonoleggiomarsala.it/userfiles/files/wujapadojopuxuwowupi.pdfIn PDF document text
- https://tisuputih.com/contents//files/46047952449.pdfIn PDF document text
- http://katachizu.com/img/news/files/24284811358.pdfIn PDF document text
- http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d0bb1c7fce4---litemadekefurafolivugef.pdfIn PDF document text
- http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/165euvrp4p3829kq2ahvur3gr6/sigiwodiwufeni.pdfIn PDF document text
- https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/1b8ccf96a4ebbb59682f061490b7ed88/73180974761.pdfIn PDF document text
- http://urparitet.ru/admin/ckfinder/userfiles/files/65928467043.pdfIn PDF document text
- https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/4ebe7ccd4ea1373ce756021a98de8182/77576203697.pdfIn PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/rvb0mtevtldj0ko5qu9hkfvja8/14034268501.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d430d74cb5---95274402323.pdfIn PDF document text
- http://www.greenbriarpropmgmt.com/wp-content/plugins/super-forms/uploads/php/files/2a1c13c8544318c2f69c9998d92be2ac/77647548782.pdfIn PDF document text
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/ir9lhesgucu9kco2nv2983sp1v/46928321629.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ff6ab619c---kokubuwuka.pdfIn PDF document text
- http://asbu.net/uploads/FCK_files/file/zirepepijoxijoleruli.pdfIn PDF document text
- https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/e2698d594ef63df015a9ba3133135ebf/kagumafita.pdfIn PDF document text
- http://al-bandak.com/userfiles/file/83972990018.pdfIn PDF document text
- http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072332a02719---pawaz.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=ibooks+pdf+not+syncing+between+ipad+and+iphonePDF 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_off0000ba80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBA80	15984 bytes
SHA-256: `10b40c8b55acc37cf922b8f6d37c772262728b4815827d2f0996874ce610e853`
`font_01_sfnt_off0000e298.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE298	11136 bytes
SHA-256: `a2903a3d3542303c7a23853162c771541785a21d64e569980051ee5f9e1cd35e`
`font_02_sfnt_off0000fc4b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFC4B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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