Malicious PDF — malware analysis report

Static analysis result for SHA-256 86299cde67251baf…

MALICIOUS

PDF

80.4 KB Created: 2021-07-06 07:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 87f108e85a687dae0a1dcfee5ccd5e6d SHA-1: d1412f20f2c7a1eb3bc79348ddab21b2a3dc0b5e SHA-256: 86299cde67251bafac3a9386ae4293743aaefa18e962a5792ac0a354845759e9
124 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV, specifically as a phishing trojan. Static analysis revealed it functions as a link farm, directing users to multiple external websites, many hosted on compromised CMS platforms. The document body is unreadable, but the heuristics and numerous extracted URLs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4833

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 http://grawerlik.pl/userfiles/file/75388722863.pdf In PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/lqt2g7vpaef738eoncsmrl7p1j/1863673987.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/f745416f8100ae31b33f74ccc119812f/29703540208.pdfIn PDF document text
    • http://deauville.ru/files/file/mopirerubixomuvazes.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/39682634135.pdfIn PDF document text
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/pajekuvuvab.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/51237679503.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f280066a5---gosobikonibisigifofijasaf.pdfIn PDF document text
    • http://alumnicollegedelunion.org/clients/76066/File/76760307190.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba8f9edd2a---99569796112.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/490cbfl9v3dqql3r8m6t543nc8/xekojovuba.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/2f800081a4848a972d1ac2a79d06cdff/86465495268.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/a7af596b82faea20fb8c337e6be922dd/19092055125.pdfIn PDF document text
    • https://noddy.nu/images/file/12580481929.pdfIn PDF document text
    • https://tonitomov.com/picture/file/41026549023.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/51155051420.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/1a43743b659e45ea87e5097faeb15b84/40410195335.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9524b0d5a12953929c0e2f4879fb882c/vevozi.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1f4422220c---19820319388.pdfIn PDF document text
    • http://antonioruizabogados.es/userfiles/file/78300426589.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160adf95cb2104---59110553320.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160800beacf5d3---14253060953.pdfIn PDF document text
    • http://santeh.md/img/files/21897222617.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/17a63521bf133ceb338ec94ee0c8da96/litinakojozefivom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=togaf+questions+and+answers+pdfPDF link annotation

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