Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf142aa02987aff0…

MALICIOUS

PDF

52.5 KB Created: 2021-07-07 02:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c401015bec9dbe042555b40d10ddf378 SHA-1: c3cecbf7835c9fed8334e5ff04051c80a92029d6 SHA-256: bf142aa02987aff07df24b25f12bfba526c8323996c48501cc0711a35ef048e3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting domains. These links likely lead to further malicious content or phishing attempts, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6164

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://queure.ru/uplcv?utm_term=your+the+music+in+me PDF link annotation
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/0de40b5d85e9af36e16e981d8b99f448/suzalididuxopewi.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16090ad7d08699---bakafogote.pdfIn PDF document text
    • http://xedaptap.net/userfiles/file/wowimabagugasikesef.pdfIn PDF document text
    • http://omgmediatank.com/userfiles/files/13948701127.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc67e6accde---jekuzumazifogixorote.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ad83a5164---burogusibapisikitad.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096784a9e1b3---bodatukibewefosig.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/guforelogin.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbee3aabb---49100163190.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609d54e326a22---5075405446.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/c5ec2770ceed1a623451a63dbc573976/milajetekumemeva.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/7didveoc6q9febduntd6is6601/lodugizezijakas.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9bacc41674---88639512386.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/li2rdmbq61j6hgsk3373jlj1ab/79812115465.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/626cc7cbadd358e6907acf03b0a5c227/38273740630.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf90b6715f6---donububifofavodexafivoge.pdfIn PDF document text
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/48809687606.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/72686968481.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/80759775136.pdfIn PDF document text
    • http://lncxjzxxw.com/upload_fck/file/2021-5-22/20210522063354170997.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/85895208164.pdfIn PDF document text
    • http://fitviewer.de/files/file/duvenus.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/4e9b7f2123ac2bf42e14f78a1a2481bb/34472440363.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/divugoneratido.pdfIn PDF document text

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