Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e055d6565f27120…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 10:33:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 624b7caf173dacb02011ecd4131d68f1 SHA-1: b7a020855ffde432dbdb62746cedc04c96e691c5 SHA-256: 3e055d6565f27120631e0cf880145711c10ee9cbbb1a7b42b3bc74af1dbce769
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to link farms, a common tactic for phishing or distributing further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/kuwovefovexenifefidifo.pdf In PDF document text
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/sokefurasuvedijubukelevep.pdfIn PDF document text
    • https://printsolutions.printsolutions.bg/uploads/wysiwyg/files/9598306211.pdfIn PDF document text
    • http://saraswatishikshamandir.com/singhania/downloads/file/55663364054.pdfIn PDF document text
    • http://www.mmalappeenranta.com/tiedostot/files/pizemuboxadelelawase.pdfIn PDF document text
    • https://lazerom.pro/media/file/85100085928.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/83666012419.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/zokozogiwefijuvinuxe.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/94888283345.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/wetupulabenijo.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/dokejawadovizakerosujoxoz.pdfIn PDF document text
    • http://cartopack.be/Images/file/40663555563.pdfIn PDF document text
    • http://adgroup.co/userfiles/file/26825900171.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/31137263198.pdfIn PDF document text
    • http://ldksolar-officialliquidation.com/userfiles/files/mitinekano.pdfIn PDF document text
    • http://positiveforce.in/uploads/files/58475619383.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613607b0b1d9c---2021819857.pdfIn PDF document text
    • http://mrcubezpieczenia.pl/app/webroot/media/files/75866367608.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161326f42f0551---fosebifuroxagagid.pdfIn PDF document text
    • http://salon-urody-bellis.pl/images/file/tudof.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/jukemupesejabas.pdfIn PDF document text
    • https://sacc-la-chaux-de-fonds.ch/fichiers/file/28717451480.pdfIn PDF document text
    • https://mahanakhon.pacedev.com/ckupload/files/riruvan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sword+art+online+alicization+war+of+underworld+season+2+episode+7PDF 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_off0000d023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD023 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e835.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE835 21796 bytes
SHA-256: 80aa04db08dd4aa5ee2d63358ef6504a340ee5b14bc8975cfebe243b7ff2b733
font_02_sfnt_off00012112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12112 11104 bytes
SHA-256: f69495fee441da613856ddd7c8c209ef5c270f89d2fff22ec7c4742a09ec89bb