Malicious PDF — malware analysis report

Static analysis result for SHA-256 d42e269447059c31…

MALICIOUS

PDF

58.1 KB Created: 2021-09-12 11:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 92531c002cfde670ee5d8a30eb42025c SHA-1: fecef1b622308d9e826594460ef178d254fdbfbb SHA-256: d42e269447059c31153a477cec5a77f5f8e8e45bff090765349e0838424e2f42
64 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, with a significant heuristic firing indicating it functions as a link farm on disposable hosting. The ML classifier also flagged the PDF as malicious. The primary attack pattern observed is the distribution of malicious links, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9413

Heuristics 3

  • 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
  • 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://ketchas.ru/uplcv?utm_term=android+mobile+charging+solution PDF link annotation
    • http://lpxs168.com/filespath/files/20210907073029.pdfIn PDF document text
    • http://96stone.ru/userfiles/file/42969754963.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/96744933088.pdfIn PDF document text
    • http://webbuilders.com/files/file/begeguluraxepowegazelix.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/75078140135.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/81834212967.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16133ba3c7429a---65406030709.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/35274900188.pdfIn PDF document text
    • http://yachtales.net/admin/userfiles/files/bapevemapowenovefizuk.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/161381dbe1d2ab---97877924167.pdfIn PDF document text
    • https://ryokanclub.com/FileData/ckfinder/files/20210906_65E2D46E8ED98F10.pdfIn PDF document text
    • http://bebaldebaran.eu/userfiles/files/fakivusemezajezek.pdfIn PDF document text
    • http://itena.si/uporabnik/file/riritarewuzefejirew.pdfIn PDF document text
    • http://budropol.de/Upload/file/gasolupokosogegadoxufuro.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/megimoxubapovisajevinid.pdfIn PDF document text
    • http://erh-hu.com/userfiles/file/dufakipilijatumajoro.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/xiwasisosunitezejuz.pdfIn PDF document text
    • http://hyunshin.net/userfiles/file/pinoxozajowimofeki.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/dotutin.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/329494463.pdfIn PDF document text
    • https://weilmclainboiler.ca/fck_upload/file/48994326121.pdfIn PDF document text
    • https://dakotaterritorydevelopment.com/ckfinder/userfiles/files/fetasefolagewef.pdfIn PDF document text
    • https://12shio1.com/contents/files/vedunevema.pdfIn PDF document text
    • http://chono.mn/uploads/userfiles/files/zukikekuzarasilidotip.pdfIn PDF document text
    • http://back2wood.de/userfiles/file/74677903192.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFE2 18736 bytes
SHA-256: 715bc6a3e6d3ae91dfe6a752eedbb2db5b66c41a05e78b7f51d7ac0c7ad3123a

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