Malicious PDF — malware analysis report

Static analysis result for SHA-256 c49da1595febb6ac…

MALICIOUS

PDF

93.1 KB Created: 2021-07-03 00:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a58c5f29ecfaa2b11c006dea68e1678 SHA-1: e40400a0c072525c9bef90bf33cd2d1dfe90e18f SHA-256: c49da1595febb6acbc91acecafbfe8f38f5d80b5ec23aa61a96e124a90987ba5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/dd9834d4ba123cb73e67ac78a58e0921/lawoweji.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc0000ee75---64346548614.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/4ceb11e1246360aecfad67cb5f80e559/48805991379.pdf
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/sibidovifazepadebomiwasu.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/b4kgs8aqjp68j2fkehl74fe6iv/20000239275.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16078ed0cd1b3d---60390260342.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/9t522qn54908pb977489t7idrk/40051312124.pdf
    • http://canxetaidientu.com/images/file/27882471572.pdf
    • https://abicecream.ru/ckfinder/userfiles/files/xamidilimewakafixejidude.pdf
    • http://dlmberatung.ch/userfiles/files/todatujirojipewafitumifis.pdf
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/86642422911.pdf
    • https://okna-stv.ru/userfiles/files/lufiduvagedip.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec993b2a8a---nazeketose.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/h4pnloraebb3i1gsregnu0qhib/68268234201.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee89e1afcf---8370878662.pdf
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/30d2ef5c64e825cb2240e8583ec2030a/wixoxenifapuguzivulibo.pdf
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/gigalerireza.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b04993c711b---pizoxebe.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/0904da16b7dfbd700207d06f88065140/37246820051.pdf
    • https://mangmalungtea.com/userfiles/file/44029010612.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/82758010559.pdf
    • https://standardpromotion.com/images/upload/userfiles/files/lozugopelejebefinaxetopo.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+are+the+common+interview+questions+and+answers
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001070e.bin
657f1e091982acab95b1b0a22f7549a27e3038b0239d516c26cb2b7408a80d76
pdf-font-stream PDF embedded font (sfnt) at offset 0x1070E 10980 bytes
font_01_sfnt_off0001203e.bin
aa821a3da4a716954fca90f4dcc473d1404a030ac9ab9a5c2a2e3943b4418e6e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1203E 17636 bytes
font_02_sfnt_off00014eb3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EB3 16792 bytes