Malicious PDF — malware analysis report

Static analysis result for SHA-256 806d1f4d93051677…

MALICIOUS

PDF

40.1 KB Created: 2021-09-07 11:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 31e822f814637c05bab84cfc332ae572 SHA-1: 5395f78dbb7b0ddb9f3b105ade19c765bd4eb34d SHA-256: 806d1f4d93051677e200b108be6e4d223081f7ccc4ca3d045c8f6ec6f8a7ab79
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by multiple heuristics and ClamAV, indicating it's a phishing or trojan delivery mechanism. The document is image-based, typical of lures designed to trick users into clicking embedded links. The presence of numerous external URIs, many pointing to compromised CMS uploads, suggests a link farm intended to redirect users to malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9743

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://uclerbaklava.com/resources/file/28791524316.pdf In PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/nd5j0ie3nkfaomfp625368a1r0/totenajegegasezomonesoxi.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/21734707364.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/f721slkmqpfp63hlcgo1b9qt9c/rudixedimaxaseg.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/lebp56f0pck8oi5rnihdr93f9u/xalixefusaxumi.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/161161a7107c6d---datunugilokilafakidonavid.pdfIn PDF document text
    • http://sz-nuoyi.com/Upload/file/2021072411551372956.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160faadca8923c---rilosawukixel.pdfIn PDF document text
    • http://ccsl.asia/files/sepulubaxopigulewobove.pdfIn PDF document text
    • http://sartor.ru/upload/files/65548928697.pdfIn PDF document text
    • http://mldinsaat.com/image/files/wutipuxegiwovobamegid.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c70c6d12e69---93181697917.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af6a0262eff---82766244757.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/itpquv8h749va2dqp2t9d19tf6/wamugejivupaluza.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/jobukep.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/nebizeleb.pdfIn PDF document text
    • http://sun-green.nl/ckfinder/userfiles/files/24066131485.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/5fd91328bcdc858d5118eec6a0f1c337/37267029891.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/gi4uk6a2ku5h1jpqg99qjltlik/52302272822.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=pdf+reader+pdf+editor+2019+apkPDF link annotation

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