PDF malware analysis — malicious · 7a86a9e8fa011ff5

MALICIOUS

PDF

80.2 KB Created: 2021-06-25 23:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: d05aec5e3409cf7f01fe806c2804f0f0 SHA-1: 367a8b198f72fcc1a13e7c9529203c67725ea15b SHA-256: 7a86a9e8fa011ff58f5f7154166a407bb2e0362ad2a9818435ff8d418c7d7e7f

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms pointing to potentially compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.9949

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=play+pump+up+the+jam PDF link annotation
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6446b0db4---sexagowarowume.pdfIn PDF document text
- http://coimbra.hu/uploads/ckfinder/userfiles/files/55744275050.pdfIn PDF document text
- http://bpabv.nl/uploadfiles/file/wivititirewibesu.pdfIn PDF document text
- http://chinamakina.com/userfiles/file/51281634462.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160caa4fe678ad---davodinimabezupib.pdfIn PDF document text
- http://asijskepotraviny.cz/files/file/9928753256.pdfIn PDF document text
- http://derma-dts.de/files/file/92137819616.pdfIn PDF document text
- https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/691e7b44d204ecdda90bc0b42fdfad63/rudowaxujumifiviliwon.pdfIn PDF document text
- http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/kizititixafuteko.pdfIn PDF document text
- http://adamlegal.com/userfiles/file/fijoxudomumivuz.pdfIn PDF document text
- http://kapelski.pl/userfiles/file/lazime.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ukrafo0v9hqn42m3pefv21jia3/numimenod.pdfIn PDF document text
- https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/2da74014089ad542882d4ececeac9398/15941711793.pdfIn PDF document text
- http://jamessham.com/admin/usercontent/file/9217968365.pdfIn PDF document text
- http://bright-inter.com/file_media/file_image/file/10650964850.pdfIn PDF document text
- https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/a91b9a7859f59a4bb68e040b3f7142d5/kobideperoruxepaxeremutaj.pdfIn PDF document text
- http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859fdb39c48---xejawovefutupexojoz.pdfIn PDF document text
- http://synowka.pl/galeria/file/55882488896.pdfIn PDF document text
- http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/43e4c3d32d946ac5bc14fb8d1936639a/62483256062.pdfIn PDF document text
- http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aabe45c9fee---8239783136.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/c9b1c2dfff432ab809af14965d0a0d2b/luviluje.pdfIn PDF document text
- https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d993052513fcf29e1451dd30e32a2991/zonekoxezigira.pdfIn PDF document text
- http://rogersdesignhouse.com/uploads/files/sudulomepebuxi.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97b7a8a197---nizijuwoweso.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b3bb3fa8974---rokoloxar.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_off0000d6c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD6C9	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eee0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEE0	10276 bytes
SHA-256: `9eeacf46f373f06f2e0f31e464935dbf5983f42bb9006c292fe2b18bba06c2c5`
`font_02_sfnt_off0001060d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1060D	17656 bytes
SHA-256: `ca625372a6b2fdf8dbf2cacb239ae20607f4942d7eb1240649b5088614be5cac`

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