Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fe885281a53b062…

MALICIOUS

PDF

40.2 KB Created: 2021-07-02 03:07:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 383356d12befeb8e32d5f01d597f6087 SHA-1: 8d15917aeb78094e0f305a0cdc727ed2261d3a88 SHA-256: 3fe885281a53b062871dd588dde27efe4fe59ad82b9345d77fd79f748b7bc555
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-only content, and numerous embedded links pointing to potentially compromised websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site. No scripts were extracted, but the structure suggests a user would be prompted to click a link, leading to a secondary stage.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9455

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 https://autoandtruckrepair.net/nbloom/fckuploads/file/15975634187.pdf In PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608548358590d---vetasotixofenuxibu.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073db1f70ac6---gazinage.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/83710360580.pdfIn PDF document text
    • http://cs-golfclub.com/ckupload/files/wemexunej.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/xovasif.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160cad88dcc8e4---sokigokatifemoxarebozev.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7a0d5633a7daed205f845f908b487dc5/26057971590.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085a41285d99---ruzubanukukaxuvur.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/cqed32ciddgqcqhs9ne2sh58tn/3775238774.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092314a0617d---wezoxemem.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16081d556efc04---sagebu.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/2624bdaaa34239ec79a2668c1fd14ac5/75294384527.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/1c28c348ae850e9c54a7aed64ff01a4e/26814007253.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/90777340629.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/gomaxilozele.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d97d6f11d1f---jitez.pdfIn PDF document text
    • http://massageindex.nl/images/uploads/58074315970.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609abd99eb5e4---4602164223.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/fiIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=military+heritage+musketsPDF link annotation

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