PDF malware analysis — malicious · 9aa7c7186be1879f

MALICIOUS

PDF

95.6 KB Created: 2021-06-26 19:48:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 761b47928b8e5174ea5e9faa61008e4d SHA-1: f534f507e195b49dca26ea7a9b2f700f67b94e2e SHA-256: 9aa7c7186be1879f896a7415968b0e583f917911db0337794425ab343fa2d5e6

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by an ML classifier as malicious. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of these links and the heuristic firings indicate an attempt to manipulate search engine results or distribute malicious payloads via deceptive links.

Machine Learning

Nyx PDF Classifier malicious score 0.9820

Heuristics 5

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://huntic.ru/uplcv?utm_term=worst+day+after+tonsillectomy PDF link annotation
- https://fullhousetourism.com/UploadFiles/file/20210605025711144.pdfIn PDF document text
- http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160889d76b010c---kamepujetipipenigevazo.pdfIn PDF document text
- https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/cf14eeb28fe6abc497170a8e044e947b/23070880791.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720ed57b124---papoz.pdfIn PDF document text
- https://muguet.fr/sites/default/files/file/70975660696.pdfIn PDF document text
- http://forresterfamilyreunion.com/clients/c/cc/cc72bfd2512333311cc1ef5a4fdef90f/File/58487938520.pdfIn PDF document text
- http://digemnd.com/UserFiles/file/dipejolima.pdfIn PDF document text
- http://93564497.com/userfiles/tidulununepeburixud.pdfIn PDF document text
- http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608000a1541a2---61568850438.pdfIn PDF document text
- https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/65cc3757ef5fad3202be79616a8d3548/6127803456.pdfIn PDF document text
- https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/a6b9f5961bedbc31e575e29bb26735d2/tukifapamatotigogo.pdfIn PDF document text
- http://tutaylamhet.com/storage/ckfinder/files/darupatewawuduworedum.pdfIn PDF document text
- http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc742c3563b---vupitabuzavubugojedafi.pdfIn PDF document text
- https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160730561246fa---fokexasilelu.pdfIn PDF document text
- https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/8081d058fabc2928f3ee9e0c3877fb08/fevodejuk.pdfIn PDF document text
- https://residenciasanamaro.es/userfiles/files/44582812845.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b619373162b---9305127338.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a69cba25080---97021797720.pdfIn PDF document text
- https://actor-conseil.com/files/file/86862739840.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb8d710285---teketolozo.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/orahiablnff83a05khdhlh8ov4/wuvewudululu.pdfIn PDF document text
- http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5840ab5f52---96449451284.pdfIn PDF document text
- https://gionggiacam.com/ckfinder/userfiles/files/jujavabasifalafebonuxajor.pdfIn PDF document text
- http://lowndes85.com/clients/d/d3/d39312ffd46aa2fbcc4e4de04d96a17f/File/19726493326.pdfIn PDF document text
- http://creptiles.dk/userfiles/file/fiwafuwa.pdfIn PDF document text
- http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/b089vvjlhcpu4cf3v2lm8asft5/82858094642.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_off000113c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x113C9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00012be0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12BE0	10744 bytes
SHA-256: `ccab22f95a29adde3da7706c577d8b47ac255acddcfc5334bf9848a8b9758eac`
`font_02_sfnt_off00014495.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14495	17112 bytes
SHA-256: `fae323e760fa7b1baa475772a4642ebc993244ea0305e0a6c807ecd80d7095d4`

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