Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e1444966b0921da…

MALICIOUS

PDF

89.5 KB Created: 2021-08-02 01:18:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: e4aef32f57eaec83c3d163e1108a45c3 SHA-1: df8740e0675becd19638808b5c1b4b3ee9a198b3 SHA-256: 9e1444966b0921dac383959490ac70bcf45c35bcdbe3161b09e393d7d542d6dc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to other PDF documents hosted on various websites, many of which appear to be compromised. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. The presence of external URI heuristics and link farm indicators confirms the document's role in redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images//files/mipenugejevotujewat.pdf In PDF document text
    • https://universal4shipping.net/userfiles/file/godadewonijelex.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/1b723d813bfe8646ff7e8781ee9b7fd1/56744927597.pdfIn PDF document text
    • https://perfectprojects.ro/userfiles/file/sigade.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a15875d1b---8596453043.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/73746034190.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609695dc3da88---rilorovafed.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/961bc29914ebd4208b3a7f38f64fdf43/83981916237.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/87988724891.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160f85dc68e286---faditikapukugetulifik.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f6a97e385b738ae6f89fd20458dc5d92/5703546019.pdfIn PDF document text
    • http://snypes.nl/img/customer//files/74314448748.pdfIn PDF document text
    • https://asharfilalkulfi.com/ckfinder/userfiles/files/82066441662.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/fuvafadojaliwuk.pdfIn PDF document text
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608194490db1a---77949167838.pdfIn PDF document text
    • https://educhina.mn/editor/files/57138463692.pdfIn PDF document text
    • http://juha.be/_files/file/xolemirikabexigaf.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609531c98524c---26911623245.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b498c6d69c8---34048228170.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a653fe9c04---xozudukawumilavus.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f81016919---zemekukenip.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/1a8b4daccea5816e84d97e316fd78e25/memibutuzubi.pdfIn PDF document text
    • https://eldorado777.ro/upload/editor/file/fadizabuvezefozumumek.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/nevede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=pokemon+omega+ruby+gba+rom+hack+cheatsPDF link annotation
    • 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_off0000f646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF646 17708 bytes
SHA-256: 873c4e7a3c96ae412029327194252fb0ef450110aeef2d4f7ceaff89196bc8e8
font_01_sfnt_off00012483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12483 10988 bytes
SHA-256: db165017fd0505d79dc62b6a047bbaf3542950e87f5a19f594148a9bfe8736bb
font_02_sfnt_off00013df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DF5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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