Malicious PDF — malware analysis report

Static analysis result for SHA-256 9231b6baf5f446a7…

MALICIOUS

PDF

83.7 KB Created: 2021-09-17 03:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5b432166c3af9593dd7e878b10a6e5ff SHA-1: 670349f2f6f3e2d70245a371a5da2ea1a523e941 SHA-256: 9231b6baf5f446a727d1e94ee45e4c062ecf69010829ea81fe99e3b5d0678d7b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to domains flagged as link farms on disposable or potentially compromised hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. The file's structure and URL patterns suggest it's designed to lure users into clicking links that lead to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mijinmotor.com/fckeditor/userfiles/file/37611193932.pdf In PDF document text
    • http://hkalc.com/userfiles/makixalufezex.pdfIn PDF document text
    • http://staropolski.net/Upload/file/watajotexotarezujizexujit.pdfIn PDF document text
    • http://aylincinarli.com/fckfiles/file/5929608958.pdfIn PDF document text
    • https://funbugs.ie/files/file/towalibenijupupadazuvifab.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f1cb37685d866a9b229c9efec1b4aca5/savot.pdfIn PDF document text
    • https://silverbirdmarketing.com/pages/images/file/38935404786.pdfIn PDF document text
    • http://prosquash.by/data/48302816771.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/vivugugumikebajufifaju.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc0de60254---27456560707.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/fa43037f281e758985a2c05056e71302/baroxajajerir.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/18821172751.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202109161630585391.pdfIn PDF document text
    • http://tcsm62.org/uploads/news/file/fosexedupozizateref.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/57474026246.pdfIn PDF document text
    • http://canadianrockies.info/files/file/98784059658.pdfIn PDF document text
    • http://www.juniorcollege.cl/ckfinder/userfiles/files/pisavojunurupugisuwaso.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/67580187463.pdfIn PDF document text
    • http://jshanwoo.com/ckfinder/userfiles/files/65138456866.pdfIn PDF document text
    • http://levotst.com/uploads/files/44996478279.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/93337752260.pdfIn PDF document text
    • http://singlesync.com/userfiles/file/33166586512.pdfIn PDF document text
    • http://4els.ru/uploads/images/files/bitanerodosizedofuf.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/37379975323.pdfIn PDF document text
    • http://vipnjl.com/userfiles/files/58720946301.pdfIn PDF document text
    • http://phunggia.biz/userfiles/file/34553618828.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dnd+5e+sheet+editablePDF 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_off0000e212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 10400 bytes
SHA-256: 8b3860b0c5e01f647bc4b027828d34828cbd5bf255210b8eaf8c8cf9ff2886ff
font_02_sfnt_off000111a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A7 18624 bytes
SHA-256: f81f4a84185a59ccae680e639bba3ea9fdc96952ea57a052f4dff3786d1ec177

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