Malicious PDF — malware analysis report

Static analysis result for SHA-256 43315c43093f9a4c…

MALICIOUS

PDF

78.0 KB Created: 2021-09-14 08:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e89cdb78207fddf99d84c34c13b9c3a2 SHA-1: b661fcb7e969e5246909e7252a1463ead3789ca6 SHA-256: 43315c43093f9a4cf6db0b6d0951aa31aa45298ac05d5c9404f57ba812517bb0
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The heuristics indicate a link farm designed to redirect users, with one URL specifically mentioning 'how to get 1000 v bucks in fortnite', suggesting a lure. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6147

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://krisoc.ru/uplcv?utm_term=how+to+get+1000+v+bucks+in+fortnite
    • https://pcetravel.com/files/file/jeselidepeba.pdf
    • http://ppogrimall.com/upload/editor_image/file/13008261674.pdf
    • http://weorderfood.com/uploads/files/rubir.pdf
    • https://gtnet-engine.com/ckfinder/userfiles/files/barotozuwipisisaginaw.pdf
    • http://marienoellebermond.com/img/uploaded/file/sibud.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe0f69a394---xebojozegumewaziduwivi.pdf
    • http://ghinelliarchitettura.it/userfiles/files/69245027019.pdf
    • http://lianbang123.com/uploads/files/202109010108501838.pdf
    • https://extremedriveline.com/ckfinder/userfiles/files/999765280.pdf
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/naxusinefowaju.pdf
    • https://grupa-energia.pl/attachments/file/77535959670.pdf
    • https://ssmahavidyalaya.org/lion/uploadedfiles/fck/files/file/43923068896.pdf
    • http://77owship.netsociality.com/upload/files/xurilovepif.pdf
    • http://moiarchitekci.pl/pliki/file/kapifosexedudob.pdf
    • https://contact-house.com/fckeditor/upload/file/ruxakotenev.pdf
    • http://sevgineslianaokulu.com/ckfinder/core/connector/php/uploads/files/muteposutazofumupopuzodef.pdf
    • https://cosmopolitanhotel.lastrada.bg/uploads/wysiwyg/files/82831950875.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/bbba2817bd457984d96902bc8383d475/48233324581.pdf
    • https://alusol-kw.com/ckfinder/userfiles/files/52954743502.pdf
    • http://supragyn.cz/userfiles/file/23627948568.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131584b0ee4d---laxiridozezetu.pdf
    • https://eclearusa.com/images/file/94836077313.pdf
    • http://nj-rshb.com/v15/Upload/file/2021913549102654.pdf
    • https://xinpayflow.com/ckfinder/userfiles/files/3220674554.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b0a.bin
5fc009ec7e44774d0ec6705b3257252dc811a0e3a9f955bad5e9e3ee9103c02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B0A 10952 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.