PDF malware analysis — malicious · e5f867ab79dabb3d

MALICIOUS

PDF

79.6 KB Created: 2021-09-04 02:21:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: e2589f982aa5e190954cc8dc0188c43b SHA-1: afe0e0524e21cb6a6efd6e3f26557adf20d3cd2d SHA-256: e5f867ab79dabb3d59a4d8aaf0a69cbe6ce9b38d89e1694c1a73aff08bb491cb

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host malicious files. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs suggests a phishing or malware distribution attempt. No scripts were extracted, but the document structure and URL patterns are indicative of a downloader or phishing lure.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

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://irlanc.ru/uplcv?utm_term=onyx+am24+auto%2Fmanual+inflatable+life+jacket PDF link annotation
- http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3a6d5cc55---veruloresemalaxu.pdfIn PDF document text
- http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b08cae5b2f---kipinerame.pdfIn PDF document text
- https://thietkevuphong.com/uploads/image/files/60751670098.pdfIn PDF document text
- http://sushistoryus.com/uploads/files/69099459181.pdfIn PDF document text
- http://webcertain.net/contentupload/fckeditorUploads/organization_/file/jaxuzugez.pdfIn PDF document text
- http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5e35f63542---woduted.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/8c47f6c47ced57699f0714f25eea2b1c/53698389051.pdfIn PDF document text
- http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612202700ac2b---33201844585.pdfIn PDF document text
- http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086b9462b59d---42206993999.pdfIn PDF document text
- http://dailymaytrogiang.com/userfiles/files/48820581354.pdfIn PDF document text
- http://qqsbg.net/uploads/file/7808534990.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/72f63b6ad54cd509b3d65d3953891256/72381612904.pdfIn PDF document text
- http://ip-golubev.ru/ckfinder/userfiles/files/99091343261.pdfIn PDF document text
- https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/949e57cf221accf2b8829ee501a38efd/13788952736.pdfIn PDF document text
- https://ajitcoatings.com/uploads/sexebugagedutunibu.pdfIn PDF document text
- http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160a758ab75db2---kevekez.pdfIn PDF document text
- http://driver-jazda.pl/upload/file/37213038861.pdfIn PDF document text
- http://camwater.org/media/files/berexuxufem.pdfIn PDF document text
- http://hurtmar.pl/Upload/file/1269084765.pdfIn PDF document text
- https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/jslur75rc9opkd59amqud10kq8/baruzipepafudavosa.pdfIn PDF document text
- https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/070a8cbeb3381faf3ea914b2effa24ac/rapanotafuwijijegov.pdfIn PDF document text
- https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/225172eb2a10d2e9a52f34d2e378f34f/figepujoxoxijuzaxetatotan.pdfIn PDF document text
- https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/kad3ssmsdpfv9hqleshgpim2vo/futuwekekuvejasivujasa.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/00ac6e4633270357df45ca3de3dfbc56/kefigenizisuj.pdfIn PDF document text
- http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d903b954ae---20781994781.pdfIn PDF document text
- http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609474f696643---5560919541.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_off0000cee2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCEE2	11164 bytes
SHA-256: `c32bfb7a6e65b7468c7b2ce5e8166b29e7053a422b837f5e568be6a863658ff1`
`font_01_sfnt_off0000e928.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE928	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001013a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1013A	17976 bytes
SHA-256: `58115315537c632faafe61f99995e9ea95dae8dd7f9af68975684ea01ea8ee07`

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