PDF malware analysis — malicious · 80c5d53084f243ec

MALICIOUS

PDF

95.0 KB Created: 2021-08-06 08:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21

MD5: f02f982ea96a4d1cd0e208c5cca31d4b SHA-1: 5a2d8ee6a3333bf45f57cdbc1713692ae02f933d SHA-256: 80c5d53084f243eca4ef41530c3ece87a6e9d596cba619347448dba49fe5c51e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external URLs embedded within the document, many pointing to compromised CMS upload directories, suggest a phishing or malware distribution scheme. The file's structure and the presence of embedded URLs indicate it is likely used as a lure to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9866

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://philabc.ru/uplcv?utm_term=what+protein+has+zero+carbs PDF link annotation
- https://maychieuvinh.vn/upload/files/maniginaluko.pdfIn PDF document text
- http://evpltravel.com/xv_image/file/vewalep.pdfIn PDF document text
- http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae28224506e---bipulifobumuvewi.pdfIn PDF document text
- http://northstarbaptisttyler.com/clients/a/a4/a4b4c2e389351fb2dee96c3f727c6a57/File/bawibuvo.pdfIn PDF document text
- http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b7f11b87e3c---xolekumufiluzupukelofiriw.pdfIn PDF document text
- https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/74d716139698d4a004fcb66a3d076b72/43599752276.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2ead2e636---81872301338.pdfIn PDF document text
- https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b546ab71869---546698550.pdfIn PDF document text
- https://bkht.vn/userfiles/file/8817754463.pdfIn PDF document text
- http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c24ae9ad7---86750558771.pdfIn PDF document text
- http://fygl.net/uploads/file/202114519490.pdfIn PDF document text
- https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/36280ff210704a315820e9c440a75846/70647466326.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed665a291cf---parafodidotokaga.pdfIn PDF document text
- https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/np3u3hj6g6mtuaoe43012kt5ps/36390090394.pdfIn PDF document text
- http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9b14890bc3---9799962806.pdfIn PDF document text
- http://paddockj.com/user_data/editor/ckfinder/core/connector/php/upload/files/gujixo.pdfIn PDF document text
- https://108pizza.pl/uploads/userfiles/files/96769148797.pdfIn PDF document text
- http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081b97606427---vagopanasimipafujukam.pdfIn PDF document text
- http://saintthomasmonrovia.org/clients/a/a7/a774d5b45fc75aba9c6fcf07501e1e58/File/86905880080.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e5f8fcdf394---38559041040.pdfIn PDF document text
- http://www.pattyn360.com/upload/forum/files/49672492248.pdfIn PDF document text
- https://akita-inu.lv/www/files/files/pimufozurula.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790c8db7bb0---44242717236.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f4f421d62---nutexuxowuraforimefe.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b882b767102---79901856207.pdfIn PDF document text
- https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7391e8620---12939781718.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_off00010dce.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DCE	17392 bytes
SHA-256: `d85b4979d01428cee74e5156e9ca25a78263fa7f99688fe87122cc3b308feaa6`
`font_01_sfnt_off00013ae9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13AE9	10620 bytes
SHA-256: `af98d7519d69aeeccfb5a8b4e3e53c0792aab6a0e3e59faf4483538b033d0d7a`
`font_02_sfnt_off00015306.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15306	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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