Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19dffa548a7060c…

MALICIOUS

PDF

62.8 KB Created: 2021-07-27 23:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 628184388d51a5c8bdca75742df513ea SHA-1: d576111875a08f44d93e55bce14dc78a67a97c29 SHA-256: c19dffa548a7060c88e897f8baf0f106f28e5546bc59e53b902f03cdf0292d5b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs pointing to what appear to be compromised CMS uploads, likely intended to lure users to malicious sites. While no scripts were directly extracted, the nature of the links and the phishing detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9197

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://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a826d3cc95---10909638216.pdf In PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/63125520860.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d3928681b---78240199713.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16078175329fe6---pobikavavonekatusazureko.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d05e8f1201---47174572090.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7516840637---pixix.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081e191b965f---juvek.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d428192c95---86038212005.pdfIn PDF document text
    • http://wshs67rocks.com/clients/9/94/942520bde836a0b401740df6f3d23d35/File/bifonukodavijujazitod.pdfIn PDF document text
    • http://contentworks.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8ce826062---49062140900.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/vibagopojonoditawesu.pdfIn PDF document text
    • http://ferrogep99.hu/static/media/file/jagenujumunasaxusi.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d460038a301---guvizazejizosudokizexi.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/zumexafelisozute.pdfIn PDF document text
    • http://purpledoorchurch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fdc5a0619---87901395366.pdfIn PDF document text
    • http://bakoca.hu/files/file/43915965443.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/l9qfaqtm7417136768989nbdl4/34132711931.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608507c71d4ad---xuzajewalona.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/71880447092.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/c93c6dc1d2b44777d28b6bb7a30b22ff/44793157670.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/58e148a260cf05a34a70cca0e418dab5/rabepenutifuwi.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae0686c1d3---pofovufiwupesa.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779da75502b---savudefol.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=convert+arabic+pdf+to+editable+word+online+freePDF 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_off0000cc53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1