Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaaa6554a72ea217…

MALICIOUS

PDF

72.2 KB Created: 2021-09-25 00:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: cfa048798115a864a6f0b5d3b813e5cf SHA-1: f38d8985dbc84495de0048ccf17dc40d3c1c4760 SHA-256: eaaa6554a72ea217d609d8e9884188454aeb1ee4050e245276a53326063a4ca2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that function as a link farm, directing users to external sites. Several of these URLs point to compromised CMS uploads, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://pistant.ru/uplcv?utm_term=mod+apk+of+ultimate+car+driving+simulator PDF link annotation
    • https://www.frontieregypt.com/sites/all/libraries/ckfinder/userfiles/files/lupuxaditewomogezuwime.pdfIn PDF document text
    • http://wmasgroup.com/userfiles/file/92064321405.pdfIn PDF document text
    • https://lecachet.fr/docs/files/faradanajuvebetitezota.pdfIn PDF document text
    • https://hkpefa.org/editor_upload/file/46922633322.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16143f3892a58f---13203181933.pdfIn PDF document text
    • https://zakarpattya-tour.com/upload/lonazofesafusalajafonuvid.pdfIn PDF document text
    • https://gullyracing.it/admin/ckfinder/userfiles/files/33319743412.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/doruxe.pdfIn PDF document text
    • http://stoka-saarlouis.de/userfiles/file/98000961831.pdfIn PDF document text
    • https://0900107678.com/upload/file/nopofedugawokogituwopag.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/zotoxekevinetunuriga.pdfIn PDF document text
    • http://letdentalab.com/img/files/57702094192.pdfIn PDF document text
    • http://microsolder.hu/userfiles/files/xuvinaged.pdfIn PDF document text
    • http://architettorobertafasola.eu/userfiles/files/panodojixosudexulifudo.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5bacebc9b---zitaso.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b36f0f9cc3d76392b5e8380a66c8bcad/48745262888.pdfIn PDF document text
    • https://psystat.net/candyticket/uploads/page_images/files/zovusudojijolazi.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/bugufoziwavenenijone.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e3e6befd1d---68687069638.pdfIn PDF document text
    • https://meesens.be/KrMee/Tekstverwerker/58678540708.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/78510266841.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/17707861322.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136cc82686f9---41395622647.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/17360152784.pdfIn PDF document text
    • http://lifecontinues.ru/images/files/budok.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_off0000b62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB62E 11212 bytes
SHA-256: c2b877a009cdc22f0af71486894b87e003aeabaea9f8271a0bfb98053b579c14
font_01_sfnt_off0000d036.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD036 16748 bytes
SHA-256: 910ec127a908585413591e0c9a256c96846b383cc7cba7fa90ff0b1ea33de938
font_02_sfnt_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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