Malicious PDF — malware analysis report

Static analysis result for SHA-256 c05c720ae3857568…

MALICIOUS

PDF

50.3 KB Created: 2021-07-03 15:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: dc0575f1dac9d050c0cb259d28d6e87e SHA-1: 8227471b6b021b464bb4dd266e440a12e88b7fe5 SHA-256: c05c720ae3857568c5730a5fe79e65e1c9afa1e3af9a222cdad1956af3ebceff
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7685

Heuristics 6

  • 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.
  • 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://medvor.ru/uplcv?utm_term=descendants+of+darkness+episode+1+english+dub PDF link annotation
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083fc0719db9---pagefefukenezitaxur.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/c9306ee9ba715e2bb1e8077d04f29119/52142643301.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/dotanurepufefe.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/9593fcea18b25b3f3bbb3c95ca9be299/3231922550.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/xonuxi.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/b618fc6064be3e30ebd1d8fcfb0af5aa/26068767773.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/duwolusamo.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/gojiwatitawurifigunosipol.pdfIn PDF document text
    • http://charugarware.com/DEVELOPMENT/charu_garware/uploaded/userfiles/file/vofosufifixizazekiwaledu.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c674be72cc3---98627071687.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/borenirosi.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bf7f553c7c3---80161877381.pdfIn PDF document text
    • https://amgaa.org/temp//files/79057675190.pdfIn PDF document text
    • https://ivaco.it/file/15907016726.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/42869462803.pdfIn PDF document text
    • http://aviapartner.biz/js/ckfinder/userfiles/files/jepifeduginexilabadokurot.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd556009096---bidit.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/meporora.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/86142750900.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/286329ff79ce9439c0fa66739fb5d5e8/lowasipowidukajikageliz.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/7qubknt5j27vkv9r5pef46ovq5/44230810240.pdfIn PDF document text
    • http://dyglas.com/userData/board/file/jasenisajoni.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b53129be9---71071326857.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160717c5914ca0---jizefifope.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/895e3a24788c9dc7e6753720712ef421/7376730063.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/nelugulura.pdfIn PDF document text

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