Malicious PDF — malware analysis report

Static analysis result for SHA-256 670ee62e6d865038…

MALICIOUS

PDF

83.5 KB Created: 2021-09-07 14:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 177b5191a1d555b16612c786c12d2499 SHA-1: a417ae791d3264c86e6c007a83bbd2e7075809e3 SHA-256: 670ee62e6d865038e01947f145ed38a649402827bc9986f3a057793c361d8d42
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate the PDF contains a link farm hosted on a compromised WordPress site, likely serving as a lure to redirect users to malicious or phishing content. The presence of numerous unknown URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16124b77c526a8---javuxul.pdf In PDF document text
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/tawakepavuponano.pdfIn PDF document text
    • http://apnschool.in/singhania/downloads/file/fajabavojogojatejaz.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8d66d0146c---tuxokamawotugod.pdfIn PDF document text
    • https://ancoraeducacion.com/images/dirotomak.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/14be699db5a50d8aa7f8cc02ed952d1f/30480446909.pdfIn PDF document text
    • http://train-in-japan.com/images/blog//file/givapibiranokugawagovub.pdfIn PDF document text
    • http://asacnfservices.com/ckfinder/userfiles/files/sewepunerijizepuxaribab.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/vurijibupigev.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/5957547608.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf4713c5d---jobifimewakunagos.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/47447740878.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/39793373080.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/sixulekituxugivufites.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/11565697754.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3b61b5cfe---49992513428.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/zaxufapimum.pdfIn PDF document text
    • http://dorrstrechy.cz/UserFiles/File/wixanaxanuzaveloni.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a543f40e4---76483254830.pdfIn PDF document text
    • https://shinaltd.ru/images/file/dasipepuzokezaf.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/ae5c9c1093368b6d3e56c64d2a0e04ae/87286948316.pdfIn PDF document text
    • https://businesslife.com/content/file/43093592404.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/4447f739ad266347a3407e502627e3a9/bafowotiteb.pdfIn PDF document text
    • https://bikidi.com/UpFiles/WebEditorFiles/file/68226573049.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=piezoelectric+electro-acoustic+transducers+pdfPDF 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_off0000df4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4A 18064 bytes
SHA-256: 30763b3ff9f970870eacc73141401a12659762dfb014dfea024958583c5e6ba9
font_01_sfnt_off00010e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E96 10808 bytes
SHA-256: 36460a3db1a50afe03583e3f44bd4d11aa8244a180bd4fee981c0e098b0722c1
font_02_sfnt_off000127b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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