Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba62bfcfb4c0f6d4…

MALICIOUS

PDF

80.9 KB Created: 2021-06-28 16:08:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 11855c5a6812bc367e6e85fda6319d9f SHA-1: 63d1b40b160b9f6c9161a61c1e248e66f1747915 SHA-256: ba62bfcfb4c0f6d4a6a29ee7d2b36a685f7208c5dd1f0fc63c08c4f9d576c507
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier with high confidence. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other domains, likely intended to lure users to malicious content. The presence of external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://coretry.ru/uplcv?utm_term=bus+to+west+wittering
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cdb0d38141b---22789338414.pdf
    • http://shethof.ch/cgi-bin/dynamisch/file/bedam.pdf
    • http://mkconline.com/landmark/ckfinder/userfiles/files/kexirologenimenuvoruwimaz.pdf
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/9038476212.pdf
    • http://work4shop.cz/userfiles/file/48291045345.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/4iu3uho6gviecacfov017af2k7/vanirog.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160830486d3d8e---doraxenawajileten.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa6eab27a---17827550785.pdf
    • http://seoulsquare.com/userfiles/file/kogapumumuxagumu.pdf
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b089b7c565b---mikag.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072233e2e5df---mesapaliganidiwo.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/jpunlah3ru6s8dfrdjsq0rpfib/jegojegerujefisazupuje.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/cb68029cae281212c9ab7a74369d9b51/42769919899.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606d61568a56e---58817587645.pdf
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/5236b98c392d46c05b1f662d03cfd44e/16456773278.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/bolizepup.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781ba47b677---bukuzaxuviwinovu.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/77a742396a10b9110b75f1cdc2808d32/migilewitas.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089103cb01b4---52334553598.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/tatarugejolunifu.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/67fc80df9ac146903c0e9b96419e5b9c/pizomapaxulolopogofekob.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1607820360e0bc---936211766.pdf
    • http://icltindia.in/userfiles/file/41452705.pdf
    • http://thuduchouse.vn/pics/file/ledememaxanesapexitor.pdf
    • 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_off0000d702.bin
80c7f5c2cc1dde8b0b6fccd368036b3f974785dc4dd73541bb71345c09e5d14f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD702 10312 bytes
font_01_sfnt_off0000ee88.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 16792 bytes
font_02_sfnt_off0001069a.bin
d8867b91d6c40f720dadf5878ea2566d9f71326e34090b037e85acc5384a7270
pdf-font-stream PDF embedded font (sfnt) at offset 0x1069A 17688 bytes