Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ddd3d7405b91e0a…

MALICIOUS

PDF

105.0 KB Created: 2021-08-21 21:21:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 481c0216c0384b2fd0b64e55b2602193 SHA-1: e65d5b6b99f67c7d4a6bdbfc77bd82a276ce26a2 SHA-256: 6ddd3d7405b91e0a7385f524ace420a621687ba1b2ddb39c0751f691bd027537
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting domains. The primary purpose appears to be directing users to external, potentially malicious content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cadcec403b5---jubuf.pdf In PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/284c2bbd642d51656924446ff9b658fd/kugikojetivuwagev.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/eedff7a6447066931ecf696459ef3773/duzejaposobamefosuzimo.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93093528746.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/filedumiditodoga.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ed92f9eb50e---kipirotofenirexoriz.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/2452e17b85fe95f2d5b37d54029b6004/muzojanigaxufuvotisezeg.pdfIn PDF document text
    • http://zjpjxt.cn/upload/uploadfile/file/37101961481.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/79190425625.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/op5u8d43r234b8atsp3hvq4227/12034227790.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28fc931c77---7776548483.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/96ani381kvgqvk89qihl97ejgs/11756516697.pdfIn PDF document text
    • http://canoto.us/Images_upload/files/80408708889.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/xixumodeduluxifowaguf.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/piramopilu.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160809c53b579a---83488303018.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/0nh9nii6gffg9bktqfjdmv8u0f/76299645938.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16218338273502.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/160913a1702b81---5404660759.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/motipogetitagipugop.pdfIn PDF document text
    • http://www.gamylai.vn/uploads/files/famujanisineje.pdfIn PDF document text
    • http://www.roosprommenschenckelfoundation.nl/ckfinder/files/files/63522344137.pdfIn PDF document text
    • https://juniorclublivorno.com/sitonews/images_upload/files/44194392141.pdfIn PDF document text
    • http://limoride.net/gallery/file/kopaxolawuteroxebi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=enfermedades+estan+relacionadas+con+la+desnutricionPDF link annotation
    • 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.

FilenameKindSourceSize
font_00_sfnt_off00013563.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13563 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00014d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D75 17980 bytes
SHA-256: b96066bc58bf992be91b329c42e64b0a1678d8dc3b50c7b4f570a4b80af9c124
font_02_sfnt_off00017b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B1C 10720 bytes
SHA-256: f1cacbcfc5e79eb1a4e3c444e65b30be19f9e6112ebe402d578059968e16eefe

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