Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad3b91c4038f24b2…

MALICIOUS

PDF

80.0 KB Created: 2021-08-08 01:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e3af2e4a476055c05a5cc54caf2372b2 SHA-1: f0396d71a3ec8b2eaa99a7568fd0db90166489db SHA-256: ad3b91c4038f24b2e1b02e382c5a865ea9f0a47038ccf931e718d7d68e365092
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, potentially involving embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7132

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://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/757cb57703cff61e7008ce993ed513e3/sokudibaxuwo.pdf In PDF document text
    • https://cambodiadriverservice.com/userfiles/file/nafoxovumegapojageligi.pdfIn PDF document text
    • http://raykingcarroll66.com/clients/2/29/292092747e06e0ab09130fa737b110c0/File/87611894243.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/281707596575.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608080445deac---27472219116.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/26be5b7e1776e72a5cfd96b0f005b77a/98197562288.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/46c3aa03cf9ad74f5be614e59479ac1b/73520485993.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/69891688764.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/rufubilolosebupu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/cd4e3639d5733afe02f631a4d2edd677/tobixisa.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4472534fdd---70390634332.pdfIn PDF document text
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/6a06a755984385a5ea4d11c3f52b7e8c/16951922684.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/d236aeb3898577a8506344fb26b001de/pixaxob.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607c865d743e6---tafekowizi.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/tufowarot.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/vakekomiv.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ff2a0a09e---tixobufizapezasi.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160866687074d4---fasexojejodogi.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/a0fc64f9c3c982602773b6b8a865fd6d/dipapavadoduzukevawipuje.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/qgtrbg3q5lr8do0t6g35cf1b3s/83640408013.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/vvm4kaa2l33okrdk270o65b8a8/95726168364.pdfIn PDF document text
    • http://ri-rm.ru/userfiles/file/49454851252.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa29a5a2947---34392529157.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/77761202351.pdfIn PDF document text
    • http://sun-tes.ru/files/file/nadonomitinuvupuxopafi.pdfIn PDF document text
    • http://mariekevanvlierden.nl/survey/userfiles/files/vajidekibanuzisulinegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=the+dark+knight+returns+sequel+moviePDF link annotation