Malicious PDF — malware analysis report

Static analysis result for SHA-256 734efd7a6af0296f…

MALICIOUS

PDF

64.0 KB Created: 2021-07-01 18:00:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 200a0027ca414cd4d42e36629d693552 SHA-1: 5793502c417f185c573ec98861d9569a2a3ccee4 SHA-256: 734efd7a6af0296ff2ea79805a98e2ecd702e26c24bd74301458e1db05333ccb
154 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including ClamAV detecting it as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS upload directories and disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7803

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://accuratesearch.com/userfiles/file/kimesodenuzita.pdf In PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608878d292e1f---soxaxabokoxok.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c90a90477a---86780692153.pdfIn PDF document text
    • http://simmsfamilyreunion.com/clients/9/98/98d47f1658d09d39d77ba56043454c9c/File/62361226916.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/5cc1bca727131f943e581ecd7c818336/xelorexoxojirat.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021060300302770.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/97ad9cea58398b1d7f316e0f41b33b87/49296702608.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db1402c1aa9---85501866090.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/25681499504.pdfIn PDF document text
    • https://steklo-shik.ru/userfiles/file/jijizimikukuzumuxujar.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160adb3597ed6c---31213484362.pdfIn PDF document text
    • https://wemservice.com/ckfinder/userfiles/files/82987821219.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1606c8c7874247---25251712519.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/3c0d240fd004699f3e78e33e72bd93d8/koxukenepenoj.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/56418568212.pdfIn PDF document text
    • http://www.celso.org/download/fubowevitojosirewusukelup.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/v12imajn5tq801errii896jhtl/25344235074.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/13099106371.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/07c2d6cd3114f5e7738f4f74396ac5a5/99486234163.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/vaxapegukaw.pdfIn PDF document text
    • http://liccuza.ro/stiri_files/file/jutunabapinimalelitaze.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=canon+in+d+sheet+music+free+pdfPDF link annotation
    • 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_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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