Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae5df988d86a19b9…

MALICIOUS

PDF

67.9 KB Created: 2021-09-13 02:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 828b14ffed2f8d7f5c4140848e14df2a SHA-1: 12d3da09ecb4cadb849895d7d7eee06f0498a04a SHA-256: ae5df988d86a19b9944a79fba301bc071949cf8d0383bdce3987ccfb125ad6ec
162 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristics indicate that the PDF acts as a link farm, directing users to compromised WordPress upload storage and disposable hosting sites, likely to download further malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, aligning with a phishing or trojan delivery pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7907

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 http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4ca6194b5---fekedevizenasakok.pdf In PDF document text
    • https://ngonluathan.vn/images/ckeditor/files/55559533278.pdfIn PDF document text
    • http://7profi.net/userfiles/file/22279136173.pdfIn PDF document text
    • https://haidangpc.com/contents/files/89863600681.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/devudijuwodajavubipifofaf.pdfIn PDF document text
    • http://lactopad.com/uploads/files/19915944886.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/lobarelakutap.pdfIn PDF document text
    • http://surmounttravel.com/userfiles/files/megesubegoma.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/53425801227.pdfIn PDF document text
    • http://www.mustwalge.ee/data/content/files/88657339843.pdfIn PDF document text
    • https://vinatech.com/userfiles/file/92140361047.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/boberojaduf.pdfIn PDF document text
    • http://xingyeknitting.com/userfiles/files/pixivakefowowupuvejugox.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dd1f42b807---baboxifat.pdfIn PDF document text
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c61fbaa85d234bb940182c4d549b4e34/dafogajuwuwu.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba7cca3b9c---74793748742.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/modat.pdfIn PDF document text
    • https://devcons.org/uploads/userfiles/files/kegefelizozinujowofel.pdfIn PDF document text
    • http://sieuthibds.net/images/files/77663147640.pdfIn PDF document text
    • http://www.zaluziemalina.cz/userfiles/file/3941692066.pdfIn PDF document text
    • https://adian.eus/files/galeria/files/witujoritedabuzotatewa.pdfIn PDF document text
    • https://rajatotogroup4.com/contents/files/vorodiwugurijedanewiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=wonder+woman+1984+full+movie+free+downloadPDF link annotation
    • 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_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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