Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb493aa57d19a278…

MALICIOUS

PDF

80.0 KB Created: 2021-07-14 02:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 922f73d34e0cae1f6f8cd5b2ce3ffd49 SHA-1: f3ab15965060b1631b6bbb68fee15dad6e7ec417 SHA-256: cb493aa57d19a278a4387bc4be4edcf7c19c6162ef23b255912b8161a388c671
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the structure and URL patterns are strongly indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4833

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://archism.ru/uplcv?utm_term=sinking+a+well PDF link annotation
    • http://hollywoodterrace.org/clients/863344/File/rugusebulefobu.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/60c8df5b869635a2c109f8ee2abac29d/xutozamoxuzupumizatobo.pdfIn PDF document text
    • http://uamarkets.com/images/file/26391275502.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cef5477df46---33684007450.pdfIn PDF document text
    • https://webmenuplus.com/images/file/mizejutunojolelut.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16092104c96c14---53544238719.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/38fda479305610dc799278376356c9ba/xanefevu.pdfIn PDF document text
    • http://jiehuist.com/userfiles/files/84248930310.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bf51ddfcf---26923940287.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/6192beded30c947de6a98487de048191/42325682448.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/91606293801.pdfIn PDF document text
    • https://demircanticaret.com/userfiles/file/13841047047.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1609a66b75109e---93576884308.pdfIn PDF document text
    • http://footstepfloor.com/upfiles/files/22932649591.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/p0a52dijcpkd0h73iv0ag8pbsp/6742244365.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928e22a9518---bikigovipepizelujizak.pdfIn PDF document text
    • https://p99.tw/pro_pic/files/48344122652.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/o32adqq8mpvn9drrtv6f0p2rc2/34596365954.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/16804964725.pdfIn PDF document text
    • http://top-conversion.ru/ckfinder/userfiles/files/japejetijotoraratizetam.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/tuwudusabunu.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/wixotufusire.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/kebogeroveda.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/68484324233.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608b41f740354---53714296746.pdfIn PDF document text

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