Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfe208eacaabff27…

MALICIOUS

PDF

92.2 KB Created: 2021-08-08 11:16:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: daa55600bb2fa92c313d62dd3098293e SHA-1: c40215fdcd171d8530f6c418287694686f17ba3a SHA-256: bfe208eacaabff27a67995d2f52525c02c6dc2dffd628eb98b46dc54b0bb8210
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, indicating it functions as a link farm. These links likely lead to phishing pages or further malware downloads. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/34c6453d5638dad048534140a0f3d9c2/55018715403.pdf In PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/6oe0rs6ae9hiqdd6bgnbtap9ll/boroganekotuwisenunifup.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a070a49a2f1---luzilamosetodijupimobotum.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8cc1538f3---12090281602.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/dotigonejepaxokawafu.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/160983516d1eaf---27992137076.pdfIn PDF document text
    • https://drsaman.com/files/13973773639.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/bd055f75f62760f4fc8d9b9bfc3be415/rujegexanuvob.pdfIn PDF document text
    • http://tortsurprise.ru/upload/redactor/files/fulitarexivebezususameb.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/60014af04d01f9cb6c07d2dd0cb6a121/3360913764.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/31130320790.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/81321508240.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/18668575830.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/nevopavavin.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/l7am7cfd1d6t7fhihb7v77l97u/94398482466.pdfIn PDF document text
    • http://novehorizonty.sk/userfiles/file/meboferipujinewed.pdfIn PDF document text
    • http://podiummoda.ru/userfiles/file/pasok.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/6e1115803911d72f1e02f730fbe8f263/12873109446.pdfIn PDF document text
    • http://jmdfhjl.com/fckeditor/userimages/file/miropakubedimi.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078d48e72358---53415931351.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/tukalaketabekazegot.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/a2i7tagva9jf1jl86920cnpjr3/luder.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/56208412279.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=who+is+the+richest+man+in+the+music+industryPDF 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_off0001059e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059E 10796 bytes
SHA-256: a66dbc6dbfe8b3533ee10f1a2f11611944b4a860cc753244796c11a392893f70
font_01_sfnt_off00011e69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001367b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367B 16916 bytes
SHA-256: 1d8e05f1bae9a3b245f862af3a0f73a08d99dc4a38e4d670c674b454736acc31