Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee129d861ab81135…

MALICIOUS

PDF

78.1 KB Created: 2021-06-27 17:58:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53ac64506e2a117e18f235c12e74c876 SHA-1: d45821a7a407de39bc31560d9010fa675b883bd9 SHA-256: ee129d861ab811357f07d48a22ac43dacb7f29139712a45cbf9b03d6d0194e1e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common technique for distributing malicious content or phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful sites, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3534d128e---bonivemijasexiz.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d68b74084---luzufupaj.pdf
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/f822g8megvg3gid0f1tbeejthb/77272226331.pdf
    • https://asthasupermarket.com/userfiles/file/kaveke.pdf
    • http://hzbmsj.net/images/upload/File/pulesejuvifawoto.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/3ebe858908b0ffe3dac71ebbae86bee9/sabene.pdf
    • http://gorisum.net/fckeditor/upload_file/file/sufusototidegowoxivixezut.pdf
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/d81d543834c13d5a3ca62d97d453fd05/9825673960.pdf
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/01gol36jd23356719b6jvou4l9/ruposabusuwesi.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/6d8a414702f30afd3251c42846c4b8b0/dexidebemoboj.pdf
    • http://zwickerfoto.hu/_user/file/xonasidoxexirexiri.pdf
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/06763f4234b0f4e4e6075d2dd9e4f40b/59627013039.pdf
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/mpjan6g0478rtl6bl2mqhgi79j/90673799412.pdf
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086a7efe1f4a---turipopokujosi.pdf
    • http://talleresjpg.es/img/file/totokir.pdf
    • http://contextuae.com/resimler/files/xemikapuluxizusoga.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/77u8et6dngqiff40vtq8qsksoo/49663855950.pdf
    • http://oticonshop.net/ckfinder/userfiles/files/80220750210.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16083ae07c4050---bezem.pdf
    • http://shannonlakeestates.org/fck_images/file/28085258693.pdf
    • https://binarbaidrealestate.com/public_html/userfiles/file/57709069756.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d93da825d---92826274002.pdf
    • http://cmtsport.com/pliki/37094160716.pdf
    • http://filtrydokoparek.pl/img/all/zelotofopadodes.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=number+1+chinese+holland+road+menu
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c54d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC54D 16792 bytes
font_01_sfnt_off0000dd5f.bin
e50d56e4aa6f776cea2d2b7e4b8f3def9531954129971e965d7cb086a1791239
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5F 16488 bytes
font_02_sfnt_off00010827.bin
8c88c461fe7f5d4cf0963327f2eaa7d4ab198d4d954f6c84bd136f522447c6eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x10827 10808 bytes
font_03_sfnt_off000120cf.bin
478d64aad58a46c60a63c2bd6d05d9c39068b35528f549688063ac651822ff24
pdf-font-stream PDF embedded font (sfnt) at offset 0x120CF 1760 bytes