Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b2bff18af0c5600…

MALICIOUS

PDF

59.5 KB Created: 2021-09-02 07:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c37762d507a61f419e3e36cbfa09f9ca SHA-1: 3d7912b7a2ae3a12d5a153fa59de0e7d56cb63ca SHA-256: 6b2bff18af0c56009c8af07b5ebf69ae48c439fb493ed27c1769e303ce418014
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. Heuristics indicate this is a link farm designed to obscure the final destination, a common tactic for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly supports a malicious intent, likely involving the redirection of users to malicious sites via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8213

Heuristics 5

  • 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.
  • 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://fertilityupdates.com/userfiles/files/49334689202.pdf In PDF document text
    • http://4grd.com/cmsimages/file/zojusawatuvitugiwanuxomom.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16077685483981---popus.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/9415555446.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/qbo4o48bsd9pfakehcnrmjmucg/zivokixositiga.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/sexelivefalujula.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/ropotumosexega.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/7eae0701df31fb8facec2415fa7a244c/24023615991.pdfIn PDF document text
    • https://medtek.vn/storage/file/jurerobibexagak.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ad8c8213543c398827b5e648d6a5d8f4/34804393186.pdfIn PDF document text
    • http://cybernet.asia/UserFiles/File/gafisuwaji.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/95836323397.pdfIn PDF document text
    • https://mahae.hu/files/files/fovariravuvotonuzufiwev.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/wifufubusawix.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/jeberarijexakim.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085372dbe807---41971099608.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/wiluravajevukivofojute.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d056d97785---42432736107.pdfIn PDF document text
    • http://saxonrt.hu/img/userfiles/files/vomuwakafelakodifiwamerik.pdfIn PDF document text
    • http://alpha-th.com/userfiles/file/tukutejefisabetunegiwumo.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/63878102445.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/binitaxewezag.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c0f7529a1b5---pafagabunemopoxowi.pdfIn PDF document text
    • http://getem.eu/files/file/98456161570.pdfIn PDF document text
    • http://studiopol.com/userfiles/files/nowirewusoweturapixi.pdfIn PDF document text
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/kebonatavojudimowe.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/fo1jr0uha5smu3urfju8v3p6d7/19559456996.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=location+of+all+dragon+priestsPDF link annotation

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