Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd78982217065024…

MALICIOUS

PDF

70.3 KB Created: 2021-09-18 09:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3480593a7190c16261cf83fd375987d7 SHA-1: 2ea1098c35fddfea2cfb1469081d5516c855b1d2 SHA-256: dd789822170650240cba99fd06920bb8b453f2111b16f221d44212e0e3a423c4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF document contains numerous embedded URLs, many of which point to compromised websites or disposable hosting. Heuristics indicate this is a link farm designed to redirect users, with some links specifically targeting WordPress upload storage. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8022

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 https://synerhu.ru/uplcv?utm_term=i+give+it+a+year+full+movie+watch+online PDF link annotation
    • http://www.psoealora.es/ckfinder/userfiles/files/butibalakidilolebesazewaj.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/16130f2d60d889---fumupizajuzesuguwuzuvexuk.pdfIn PDF document text
    • http://piscesappliances.com/userfiles/file/kimalo.pdfIn PDF document text
    • http://bodemveenweiden.nl/bodem-veenweiden-img/48549899728.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b06324c2bf---minoronod.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/bovolubebafe.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/87260497920.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/sojebimivigaji.pdfIn PDF document text
    • http://sdtrafficticketlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lizagewumofafiwixix.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/gupepoxudi.pdfIn PDF document text
    • http://cartopack.be/Images/file/8594959741.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/jexebaketurajunexuwumari.pdfIn PDF document text
    • https://cryptoshift.be/anaeter_capital/siteadmin/userfiles/files/50275325165.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/74583694711.pdfIn PDF document text
    • https://gift2goa.com/ckfinder/userfiles/files/delifilizadisidasukap.pdfIn PDF document text
    • http://ronaldtan.nl/images/photo/disebomalanikivipagoxubok.pdfIn PDF document text
    • https://catequesisnavarra.org/guiarte_userfiles/files/pufibej.pdfIn PDF document text
    • http://danieldesignpro.com/userfiles/13635440302.pdfIn PDF document text
    • https://smlstripedbass.com/home/rock/public_html/ckfinder/userfiles/files/41718132662.pdfIn PDF document text
    • http://najlepsietorty.sk/uploads/fck/file/kisipibomomet.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613773e55583c---4319890820.pdfIn PDF document text
    • 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_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 10932 bytes
SHA-256: 7849744e567e8dcc9b921f43f483b78f40f3f99f7acd6c97eaa63c4fc7e6498d

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