Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf01cef90056e77…

MALICIOUS

PDF

60.0 KB Created: 2021-07-02 03:38:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e25a62b281d71f86736d4d9c69fc9576 SHA-1: ba79f7466588e421ebc109e54608f091489c7bcc SHA-256: ccf01cef90056e77c7a58c1228b6a7163a998320a2cd46e77fdad0416dc135ee
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and a significant number of external links, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5358

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=gas+stations+with+gas+near+me PDF link annotation
    • https://childconcern.in/trila/userfiles/file/tejub.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/03e373c77aaf74334806d15184fdea51/moxeb.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/74471491194.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/65705819554.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b90bc025fa---21087278022.pdfIn PDF document text
    • http://kappp.ru/js/ckfinder/userfiles/files/jajufesupugesajobot.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2a70a6ee9---bevevojuzaxogatavot.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0821b4f0d---66747185285.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/e63b976ede217181455c19b041c031ee/14224202358.pdfIn PDF document text
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/sgju314s7lgujq6cfbammrtv4q/vigavikes.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/3a9be5d5ed83595ee5b2a5f3f87f547a/45454069110.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/tixekud.pdfIn PDF document text
    • http://hotechike.com/files/files/nigukonapozivojene.pdfIn PDF document text
    • https://takipcisec.com/calisma2/files/uploads/92123073510.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160770a5ec2b78---83745211201.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/63925507ccea16bd4d7e22d1aa504c93/15864524860.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-6-14/20210614233546912986.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/81661735282.pdfIn PDF document text
    • http://msamerica.net/clients/873634/File/1557427810.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///vogulowupowena.pdfIn PDF document text
    • http://pi-consulting.ch/download/vabobigadapotirepi.pdfIn PDF document text
    • https://oversaslogistica.it/file/gazoloxebavisazegiwuw.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160812ecd4b618---jepawonakuferodatisobik.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/26a9412a8413ed2c6f8ec7d92a15bb5a/51387924676.pdfIn PDF document text

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