Malicious PDF — malware analysis report

Static analysis result for SHA-256 1746cc6de23a2720…

MALICIOUS

PDF

76.9 KB Created: 2021-09-09 10:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a715ffd99512992b25c923df742f0cbd SHA-1: ee43d91c739ebcc3377f9262177ea7c14d760730 SHA-256: 1746cc6de23a2720640c8aaf53caecefc196b3ed30655d84c0a6fba122606f3d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, directing users to a variety of domains, some of which appear to be compromised or disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to phishing or malware-hosting sites. The embedded URLs and the PDF structure suggest an attempt to exploit user trust through a seemingly legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9894

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://gps-tw.com/CKEdit/upload/files/90266248427.pdf In PDF document text
    • http://www.centrosanmarco.eu/img/news/files/97403921885.pdfIn PDF document text
    • http://hueide.com/upload/files/696774144.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16131748fda9fd---77899860812.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613992f7120dc---xatate.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613008bed7283---zabodu.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/ninefitexu.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/tenewafusum.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/52259213486.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/31808927361.pdfIn PDF document text
    • http://raylutickenterprises.com/userfiles/files/69400440141.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612fbe76a6696---12235162174.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/vosaxikazosaxivage.pdfIn PDF document text
    • http://isvpro.com/custom/files/11311878818.pdfIn PDF document text
    • http://zeminyerkaplama.com/upload/ckfinder/files/91386473815.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/batipe.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/xawijawogovubin.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/34198752026.pdfIn PDF document text
    • https://cauthinh.com/luutru/files/8680522559.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16132c83bacd98---tarujadogujekenu.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/galurezup.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/81042559361.pdfIn PDF document text
    • http://vinhomeshaiphong.net/app/webroot/img/files/jaxowuraji.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613930ab24eb7---liridodovilamawod.pdfIn PDF document text
    • http://yusungchart.com/userData/board/file/bosojumamexiliwetanibore.pdfIn PDF document text
    • http://gasasosong.com/upload/fckeditor/file/sagurupitikeviwuviwabu.pdfIn PDF document text
    • http://balie.overeembv-profielen.nl/upload/files/bufepezuwawaluxorilegi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=afrikaans+words+starting+with+gPDF 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_off0000c08f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC08F 10616 bytes
SHA-256: 9047cbf6b4d5f4ef1810d913913baefaffc88b3cb3021bfb094d67cd300419b4
font_01_sfnt_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 20328 bytes
SHA-256: 6e0e91d09b75ddda95ef20b0e5a863f345e9bf23130ec11a0afc2ae33a19f99b

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