Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9f27d4c24fff7d…

MALICIOUS

PDF

60.7 KB Created: 2021-09-11 08:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 29e9d172f5d2bd5613c6c321933f078f SHA-1: e849d3eeb894c766cf2c06ab77b874d110716b9f SHA-256: 4f9f27d4c24fff7dc062e49678566eb4dcad46da2638792560760e04a575ef1d
132 Risk Score

Malware Insights

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

The sample is a PDF file that contains a JavaScript action, indicating potential malicious behavior. It also features a link farm pointing to compromised WordPress upload storage and other disposable hosting sites. These links likely serve as lures to download further malicious content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3485

Heuristics 6

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://agapetown.net/ckfinder/userfiles/files/50495351389.pdf In PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16135141d2f6d7---simesoviwoguminopuse.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/vaxopoxunege.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/dadepevafugodofit.pdfIn PDF document text
    • https://narellesastro.com/userfiles/files/luzurovafej.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/80631517381.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/pokiridikidakipi.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/81902560523.pdfIn PDF document text
    • http://prosefkuchare.cz/userfiles/divejavimosano.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/5751552961.pdfIn PDF document text
    • https://nationalshield-uae.com/userfiles/files/jevugilaf.pdfIn PDF document text
    • http://geodeslaboratori.eu/userfiles/files/35720200363.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/43302646420.pdfIn PDF document text
    • https://nepalonlineexam.tisaracademy.com/userfiles/files/zonazekavazalopetasuzop.pdfIn PDF document text
    • https://ibrahimkoc.com/images/Media/files/69662451823.pdfIn PDF document text
    • http://maszyny.pl/userfiles/file/70894480133.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/17862731622.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/raluzepizebitabo.pdfIn PDF document text
    • https://halkum.rs/files/83117338645.pdfIn PDF document text
    • http://cmtdental.com/upload/ckimg/files/71273441276.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/19601987594.pdfIn PDF document text
    • http://blgjad.com/upload/files/sazusofekoxozinoluve.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/161379b29303a8---57443705413.pdfIn PDF document text
    • https://newshieldinsurance.com/demo/gsa/final/images/file/vevogoferavezamuz.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16131ce31b3ece---lozivumiz.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/51208935889.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=sky+filter+apk+downloadPDF link annotation

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