Malicious PDF — malware analysis report

Static analysis result for SHA-256 864bde290afccf11…

MALICIOUS

PDF

62.0 KB Created: 2021-09-06 16:09:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 586ad232d7bbec63cf7f58d81e301e99 SHA-1: cdba2f4d0a400231a62111aa9865201191e3db64 SHA-256: 864bde290afccf111bc1c6e85ab7b32abff69e2ed80c03208e93ca00b13fc54a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. The presence of these links suggests an attempt to lure users to malicious sites for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5512

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://dorrstrechy.cz/UserFiles/File/27663594111.pdf In PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/pnb0ctgbqm7avg1r5inr2q8cq3/21281114710.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/zazulawevona.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/mavijulusapeteguririmapes.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3ca03918f---20864401277.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/d52frbegmfv92cdoiau4nk7gh1/66245170660.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/pawirujegotafixobomasozij.pdfIn PDF document text
    • https://fentesmakina.com/paket/upload/files/dudafarulu.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/n5tj0c91kbfd2g313g7qdilsk6/gebit.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/72799939187.pdfIn PDF document text
    • http://songpinhao.com/userfiles/files/wujeleraxufa.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/63328833129.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/delovilapebiva.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160806dfd1d1a8---41130621076.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/33112418802.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/neroxupoxino.pdfIn PDF document text
    • http://davisfolk.net/clients/1/1f/1f1070e31f35868a9a13f38ee7dc887f/File/16638542226.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c9a50d0a3---67278816874.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/46ef1f99417f985b90ba41c1d83da0ac/bosajomilug.pdfIn PDF document text
    • https://flavio-tonon.it/public/file/49237077541.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db72a5d597c---benapozasupexurom.pdfIn PDF document text
    • http://thegioimercedes.com/upload/files/patonelilunuxujipatuz.pdfIn PDF document text
    • http://score1forspencer.com/clients/4/45/4587145e2679cb7673d0e21b436e5c25/File/55636476035.pdfIn PDF document text
    • http://wo-kop.pl/userfiles/file/gegumekakemiwugub.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073d87e91fb3---wovefexitobufasiw.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/kgdtpgn56f8easphlku31gp101/sujebegixoxage.pdfIn PDF document text
    • http://idcla.net/upload/files/sovijuzugajufefe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=nj+driver+license+manual+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE36 10836 bytes
SHA-256: 283a58df6cfcc03e936f60ced7606485d4f1ec6a63fd1d7ffc9474a07f2938e5