Malicious PDF — malware analysis report

Static analysis result for SHA-256 5812d3b20dd2ab17…

MALICIOUS

PDF

40.8 KB Created: 2021-06-11 08:02:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 948dc10ade04330a9b2862fcd7bbf084 SHA-1: 70c66f70e0cc5168a1e6430c66f4a8bf245dbdc6 SHA-256: 5812d3b20dd2ab1774bb48d1dce930ed8a6e45f3a7b06fe329f9a4fcf2b392a6
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8033

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://irlanc.ru/uplcv?utm_term=shooter+games+apk PDF link annotation
    • http://daiichilogistics.com/uploads/news_file/50414332975.pdfIn PDF document text
    • http://tasteofruraleurope.eu/upload/File/21061117928.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/d4e444d2oe6q9ofbgf1ildc67a/94582096809.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3080e479a---zidepikuzozalet.pdfIn PDF document text
    • https://sambelteri.com/contents//files/xetadafiwowibame.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f123f3fb86---zukut.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/372c87283062d15cf2ee2454dd874144/tewelefenifiji.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/dudajaxapupin.pdfIn PDF document text
    • http://ekotronic.eu/files/file/kavedomibasi.pdfIn PDF document text
    • https://parc-hotel.info/file/9178375649.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607771b0ef7da---90784055412.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/52711993360.pdfIn PDF document text
    • http://gwhs79.com/clients/867100/File/jivafi.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5c0068f5---43025002234.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/kudetaripupubukaw.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a079846f0c0---35815156667.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/q6caa74pqloatglehb9jibu3cn/xamamalefawixejuza.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081f11ed1618---kabanojipafiwokumumotoru.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afeffaa71c3---80011449344.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.