Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e77696d1b6a0cac…

MALICIOUS

PDF

92.0 KB Created: 2021-07-31 03:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 562a6b2d9d8c9da217f1af9ae90e09b6 SHA-1: 69d7627f49c0be5632dde6710e2266f3d2f2693b SHA-256: 5e77696d1b6a0cacd2083ff4620a06b68a43840d16bc44b7c899e21fb2774edb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The ML classifier strongly indicates maliciousness, and the presence of multiple external URIs suggests an attempt to redirect users to potentially harmful content. No scripts were extracted, but the structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 5

  • 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://drafthe.ru/uplcv?utm_term=autosar+compendium+part+1+application+%26+rte+pdf
    • http://unesco-mediain.cz/fckfiles/file/gebedaliriwegufarex.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/3akj619qd4l4anh5nmqvfu6qi5/gilevisafikavuzifizuxumad.pdf
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609edf938684b---67251758807.pdf
    • http://burrburroughsfamily.com/clients/55468/File/lanoxudorufafakoda.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609be12c9026b---78517761596.pdf
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/33dc09f874d0d53d85a69a5681a8b3c3/jenukikikuzodatebabegov.pdf
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/caa35ecc93317194e31f5bacd0e4ac63/losutasonukedem.pdf
    • http://precedent.by/_newsite/images_from_html_editor/file/49110278056.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160db3bf05b2e2---fujokuvoraniwolinutena.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071bc0a9f127---bixilazo.pdf
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/6f282e2346c24ca1abb58a66e7a62f9b/1452573276.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608725d4a19ef---diledalogarigogoleg.pdf
    • http://hotechike.com/files/files/zezisemuliropusesifaxagu.pdf
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdd6be3195---nejopupejukopabebe.pdf
    • https://megatex.ua/images/uploads/file/nozofoxudisevo.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b25b1d1ca4---66702973875.pdf
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/0605f6d82b322bea87ed8aa87d192741/rixekosi.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/qqhi6tf8sjkchqma86lkrkdjc6/mejegelolijakogevovado.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/8b1588b5a7d990705653578aa166488c/58144082449.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/32a0e03eae17aa64a23b0d487ed5354f/darefikuditonon.pdf
    • https://davaocarrental.com/images/file/82982376573.pdf
    • https://footballsod.com/images/ck-uploads/files/23825816791.pdf
    • https://cevhertemizlik.com/userfiles/files/25601713788.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/0b4d0f767825b1343c1f3df1255953ce/kazita.pdf
    • https://rosewoodcity.org/nbloom/fckuploads/file/fatibudulonazogazugedeb.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_off00010658.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10658 16792 bytes
font_01_sfnt_off00011e6a.bin
0dc3828145ce27124360afe724a1d65cea115e55bab61c574a530afc1af6729a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E6A 16448 bytes
font_02_sfnt_off00014923.bin
04e3e0e496904763b120b86c7fb8a7291288b0d1a5471b55f688cef6404c6009		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14923 10808 bytes

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