Malicious PDF — malware analysis report

Static analysis result for SHA-256 c289983a1fc12874…

MALICIOUS

PDF

66.4 KB Created: 2021-07-23 11:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: d05a51b7c515dfd7b2313329f804a4fb SHA-1: 77c52990791bdd916bbe6514e7fd0589aad956a7 SHA-256: c289983a1fc1287482d038abc1bb9ea05713b099c1f33989bd0acf769bf03902
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, which in turn host other PDF files. The presence of these links suggests an attempt to distribute malicious content or conduct phishing operations by luring users to download further malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5089

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/c363bafde658e688f5d7257d6e69e2d6/xojoreke.pdf In PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16087cc700b55b---83207339906.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160d5387be0dad---sezojevosulo.pdfIn PDF document text
    • https://epiphanych.com/images/file/50670442742.pdfIn PDF document text
    • http://partnerplus30.ru/images/fornews/files/54030129107.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b04da25b6d---lezanofisifo.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160862690c4eda---kojagalususakugel.pdfIn PDF document text
    • http://7gking.tw/upload/files/94478542245.pdfIn PDF document text
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/19127694147.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/tilof.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1bbb4096c---gikavidisimofo.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/9249267179.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd3b51ba9a---11696223795.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/38471f7c9a5f12a131f35a19ff7ebc07/dinerufamalawewirinog.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/sajujeposejipeperedux.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/e93b7896d32373c87e5b3a4168cb901d/18235724117.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/c5b2478e54d2120087b4d792b7fc0ae8/bojuliresube.pdfIn PDF document text
    • http://harrisonsfamilyreunion.com/clients/62911/File/madufigopinu.pdfIn PDF document text
    • https://www.hippocratio.gr/ckfinder/userfiles/files/77724728480.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/5a187c9c6031ab2d28dd1b3a8510b556/gixitopog.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160939fb040db9---26232620824.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ffb31a0bc6---bafakuvaxoda.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/d959f9512aeb3840e88ac5c9f4110e10/11157349824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=word+online+transcribePDF link annotation

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