PDF malware analysis — malicious · 7a7a7266aeca5f17

MALICIOUS

PDF

83.0 KB Created: 2021-09-03 09:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 1e62e3ce4fa2c31543cd903d67916215 SHA-1: 20933bac578f1f999326d951a6a318bd25f99771 SHA-256: 7a7a7266aeca5f17bc0bfc5442732bcab160ff76f7b8e1c0f26ce2e59334becb

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external URIs and is identified as a link farm, with several pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

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://medvor.ru/uplcv?utm_term=playing+to+win+pdf+lafley PDF link annotation
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/a107292093feeafc7eba9be1a8a8fef6/zojinupurorujijoloripu.pdfIn PDF document text
- http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16073e885bc9bc---31037725839.pdfIn PDF document text
- https://jamurgoreng.net/contents//files/tujojakojinabajupawaga.pdfIn PDF document text
- http://gazetavk.ru/img/file/76175426102.pdfIn PDF document text
- https://taxforce.nl/userfiles/files/fukuvimareneno.pdfIn PDF document text
- http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lujuwugujikiwitizifipokiz.pdfIn PDF document text
- https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/5k8mb8310et1o7t81h9cd02hr1/pezebaxagov.pdfIn PDF document text
- https://saatyapi.com/upload/ckfinder/files/35356618456.pdfIn PDF document text
- https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/qm2pu8uqivm777h8d5etbpddmk/lonobeb.pdfIn PDF document text
- http://koreaseals.com/ckfinder/userfiles/files/muxunusamaxero.pdfIn PDF document text
- http://dichvubaove.online/upload/files/kefeluwosesomapoxaxuxib.pdfIn PDF document text
- https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6baa3181b---19911069255.pdfIn PDF document text
- https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83f4d2e43---93316909916.pdfIn PDF document text
- http://www.diplomat2014.ru/ckfinder/userfiles/files/vedawalifugeva.pdfIn PDF document text
- https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/9e5d03e350e04ca4c9974d5f7459c29a/80024338997.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6bfc43efd---rijefovoz.pdfIn PDF document text
- https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/adb555d45659fe891ade5d30ac9d71ef/11460693993.pdfIn PDF document text
- http://olgapolyakova.com/files/files/57985059747.pdfIn PDF document text
- http://haai.org/upload/file/fojizuburimexe.pdfIn PDF document text
- https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9176c7878---37682289789.pdfIn PDF document text
- https://kme.pl/global/app/webroot/uploads/file/16233969750431.pdfIn PDF document text
- http://ottotech.center/userfiles/file/67657906315.pdfIn PDF document text
- http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16076c75066e36---90986792280.pdfIn PDF document text
- http://4seasonstours.in/userfiles/file/xetikapojibapofanuraxivov.pdfIn PDF document text
- http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/1607a85f45eab2---kefeduzuvexik.pdfIn PDF document text
- http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5a69ae0a3---61003766441.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_off0000e11a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE11A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f931.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF931	10608 bytes
SHA-256: `30dc35e7dcb5982c18c3f8ed3e418d0b76624f0eaeb7bb130755d7f17d44dfcf`
`font_02_sfnt_off00011162.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11162	17536 bytes
SHA-256: `77f4bcb0963b8b8b6bf09f3d6902f1c6bf0e17108a7c64ce0e2664c8838303cd`

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