Malicious PDF — malware analysis report

Static analysis result for SHA-256 971a2df0efd6b6e2…

MALICIOUS

PDF

88.8 KB Created: 2021-08-07 00:34:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 618f0a6183aaaa8bc705a8ee1568024c SHA-1: c84f8eda927fabd87c82b2306d83ced05e981899 SHA-256: 971a2df0efd6b6e2b10727e0c8ba02bad9a00401bd5f7f15568403ed6e803348
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites. The heuristic 'SE_PAYMENT_REDIRECT_LURE' indicates the document's content likely attempts to trick the user into changing payment details. The embedded JavaScript and link farm structure suggest the PDF is designed to redirect users to malicious sites for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=how+to+use+outlook+for+mac PDF link annotation
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abc43ae36ec---97545382411.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e721e8116710815753b8e233c47b16f9/59042198829.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/55714418114.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/30399d1c0342b742269059b40ad82321/pokogevenusaj.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/trpvcpvu14un4phvjtf3q7dae6/3221518880.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1d801494c---86263423592.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/751acb9e83ca942a10ad625a50b235b6/23988489114.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/37619342572.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/nikobokimiga.pdfIn PDF document text
    • http://citywideok.com/clients/75789/File/gevalejamakiregezepanote.pdfIn PDF document text
    • http://bluebiz.kr/userData/board/file/56219295693.pdfIn PDF document text
    • https://bbdirect.com/ckfinder/userfiles/files/87639404133.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/9e950a43552a0fff1968ec4636042f54/70299471707.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/2a4f9d64a27b976c0832f996346cab02/6549243229.pdfIn PDF document text
    • http://dzwigipoznan.pl/userfiles/file/komoweboju.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca8a9e5e2f9---noxarawasigunoludaxagataz.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ab1a77b47af545b5cc2e3407241ac1fe/zedesureposilixadejagus.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/51bb74f451f9b7b29810e34b78d85fa6/nipuguwafumakegaxelokazix.pdfIn PDF document text
    • https://luyenthitoeic.info/userfiles/file/27052737687.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/c8dj5km5vebc7o4i1gn6lujjsr/39764708073.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/98328761220.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68cf080861---zisinarixumowugixenetozu.pdfIn PDF document text
    • 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_off0000f656.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF656 17340 bytes
SHA-256: 5c058ad56022e8d4f2cb8a1d4f89c60373bd8b51c2152c2b3918795d77fede19
font_01_sfnt_off000123ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123ED 10572 bytes
SHA-256: 5a4e55cb6705a648f3cc40e4a780500f433131d794e6b3291008df831c90c2ac
font_02_sfnt_off00013c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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