Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e046803d3f1a6bd…

MALICIOUS

PDF

85.6 KB Created: 2021-06-26 20:20:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 579c805526b626319fd25ff4c3b8efba SHA-1: 26641b44244de2c1bc35dcae48d1276f7ce94732 SHA-256: 3e046803d3f1a6bd13e4b5faed25bff02f5d263326c72e5b1f391df13c56c6b4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. It functions as a link farm, directing users to numerous external URLs, many of which are hosted on compromised WordPress sites. The presence of these links suggests an attempt to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=dil+dhadakne+do+mp3+song+download+pagalworld PDF link annotation
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/cd47df66f62de53414ecf60968e885ee/79513624904.pdfIn PDF document text
    • http://lezeckastenakosice.sk/upload/files/bolovukemegimi.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/8480994980.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16072fd9bc8f97---wuwesigibuwiva.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f28d2e322b---muzidewalironetilalu.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f71ed4a9af---90988394708.pdfIn PDF document text
    • https://iominneapolis.com/wp-content/plugins/super-forms/uploads/php/files/0a5e80890b6e257591ebc4d4e8b73654/totisirewirunofakopozimig.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/esess00blgn6it357u0v7fnr9d/jowefoxefifimetomor.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/kuzagojerimubojapobofus.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9df12c1fe---pokobaro.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/4guc94alr4kmei9c3eltbfqs97/votiwujulupiz.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790d37c53dd---54400965338.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/34a8f93f31dbec0f031d9241264f245d/wigofowujasinarebapu.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/13721191997.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a332f8753f---buvorefasabidijilifas.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c902e9ecb38---35138911027.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/bubalelilubulimonevipido.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160774802bbd06---nakitinefezil.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d9a2af02b---litotagowasesuvom.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16099daf789eed---fixirexukibomumaxelox.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/xexudixexetupodevanunoj.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ba03c4ec4---reriladarawizin.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b536c4813---96619553307.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/83928768527.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_off0000ea9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9F 17036 bytes
SHA-256: 44081b81289412da941b18bb3ff6b4db8e8887571eea9cef0b5764432b725a0f
font_01_sfnt_off00011743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11743 11092 bytes
SHA-256: 15c8876f1e480a7ecef0cc41f3185106dc0161cd3227b4a5ffdcdce076f216de
font_02_sfnt_off000130b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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