Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4e5093baa70307…

MALICIOUS

PDF

82.0 KB Created: 2021-09-02 02:59:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 70094d01b626fb0d98ec4808fa0253d8 SHA-1: 86fd46b556c2225a0f9c515f53762ce76b8e1853 SHA-256: 3b4e5093baa7030763db091818efbb27081bca89f571334933fc112b93777fa6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URLs point to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://garglob.ru/uplcv?utm_term=on+the+waves+crossword+clue PDF link annotation
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/46u19hsm8o9u3s3trgns4144tm/vofawujixagawejidufesana.pdfIn PDF document text
    • https://www.disbel.es//ckfinder/userfiles/files/63251532896.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/6f04bb32431b7ce64c62875181243be5/kufexevexapujexuzovubus.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/wifezos.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/gisufitorajegomejegetave.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/89a31966ca6bc9db92ec7fc4503e90b2/71835613336.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/famonetoporademezozoguz.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/48047006391.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/babonovepelavefo.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/46710582706.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/robinifiwutidakukilojika.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/79580275042.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/31962324122.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611836c8ecfea---sivajanak.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb969448ab5---dirazevadokupuketumido.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607447f6c9ac9---zakukanelegomujakita.pdfIn PDF document text
    • http://toastwarenhuis.nl/app/webroot/files/userfiles/files/467888710.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/nebugegixokokaxope.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/zezugoxi.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610fbd93b9de1---bewuvuraladipaz.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/f22393cd05fa7ba10521521f985c77db/kakadagiseluve.pdfIn PDF document text
    • http://status.cz/UserFiles/File/68718393841.pdfIn PDF document text
    • https://www.southdownscellars.co.uk/ckfinder/userfiles/files/nesuzuvawakuna.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/95891594209.pdfIn PDF document text
    • http://nature-revive.org/files/file/fezapovolorex.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210706014517.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_off0000db57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB57 17896 bytes
SHA-256: bf20dd38e26f10dd5daa5b7fc0ce0757ea2d3884ac1ee1d33818a562aac70752
font_01_sfnt_off000109af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C6 10652 bytes
SHA-256: b978e6d87c9375ce9a7f57c2e53c9c0a43a56ab34dabbdf850260f92d86e3cc5

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