Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ee4ad3de20ad97b…

MALICIOUS

PDF

62.3 KB Created: 2021-10-01 09:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 38c7bf484ba9266e492d292c6029e808 SHA-1: 7d41d4b016c9a9062949248efe14601b23a0c1e0 SHA-256: 8ee4ad3de20ad97bbfc03586f39d4e28c92784d3bdf4a706e5630064fabe3ef2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a PDF document containing embedded JavaScript and a large number of external URLs. Heuristics indicate that the PDF acts as a link farm, with many links pointing to disposable hosting and compromised CMS uploads, likely for SEO poisoning to lure users to malicious sites. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities, contributing to the overall malicious intent of delivering a payload or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7090

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://huntic.ru/uplcv?utm_term=super+smash+bros+ultimate+download+for+android PDF link annotation
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pufitoxatani.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/jafitemotanifijolen.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/novofuxeridixetepareba.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/jezudefixonosutun.pdfIn PDF document text
    • http://mbjarrahi.com/UploadedFiles/New/file/51281327495.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210915_D4C28B548A44B7D7.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/8cde3c94dbfa4c9c180458ace62e7ce7/munebivudajaganujidugeve.pdfIn PDF document text
    • http://d2dgroup.net/upload/files/67027920683.pdfIn PDF document text
    • https://congnghiepxd204.vn/upload/files/lanoxun.pdfIn PDF document text
    • https://mbzgogo.xyz/web/img/podborky/files/79599125183.pdfIn PDF document text
    • https://jnnjhansi.com/userfiles/file/bubupaponevaru.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/63799616908.pdfIn PDF document text
    • http://labmansour.com/app/webroot/js/ckfinder/userfiles/files/93674948022.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/05639a9fd66d6553bdb7cd56f829fdc7/dekazojanu.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/99668485356.pdfIn PDF document text
    • https://santaclara.com/wysiwygfiles/file/57757178167.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/buwuxedetajalatopav.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/12763320804.pdfIn PDF document text
    • http://www.hausman.eu/images/wyswig_images/file/fesavabadotixov.pdfIn PDF document text
    • http://tekizolasyon.com/ckfinder/userfiles/files/66700802946.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/jasadep.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/vagesizuguwiforipenozaja.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614bce512d045---92211424087.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE58 18224 bytes
SHA-256: ac7f6b372b164fbd1f9a81e17e0ef49453201eb5fceb0f2b3656d8ab0d3e19e0

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