Malicious PDF — malware analysis report

Static analysis result for SHA-256 410f9cdec18feb30…

MALICIOUS

PDF

62.3 KB Created: 2021-09-05 04:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c6c87ff7553f1b24a056b203b634f4d5 SHA-1: 1fee210c72252fd0910c215e331cb17aa66bcf51 SHA-256: 410f9cdec18feb3054d3985b26fcce34b6c41db056c507ade6daa6e426a40638
154 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised CMS upload directories, indicating an attempt to host malicious content or phishing pages. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5156

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zonwering-nederland.eu/ckfinder/userfiles/files/83260709144.pdf In PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160891564d14e1---lorese.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/baligimulajexof.pdfIn PDF document text
    • http://commsoft.nu/demo/ktb/wsmbilder/files/93568085428.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/32b7a3d97a9c0d95151fe52f34eae8de/mugefojijiwizuwejetud.pdfIn PDF document text
    • https://curryleafharleysvillepa.com/hang/userfiles/files/98358314323.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/maduxiputipipovibit.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/paxadugada.pdfIn PDF document text
    • https://eltechma.com/zdjecia/fck/file/35515318786.pdfIn PDF document text
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f15f3789b---vufisikujinejanuvu.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/52216321555.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c50e92118eb---37779455862.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3a6d5cc55---veruloresemalaxu.pdfIn PDF document text
    • http://alconburyreunion.com/clients/36523/File/surulejug.pdfIn PDF document text
    • http://medicare-darmstadt.de/bilder/UserImages/file/wolekoterapanake.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096262ec928e---24331809828.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/188708944860a1c9f3d0781.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fb807a689---43235513860.pdfIn PDF document text
    • http://paliukenas.lt/i/File/fazubupoworawega.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/42774737991.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/wizilagibimadabufavofe.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/36053569663.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/161235b378a300---nanazigudomajideruk.pdfIn PDF document text
    • https://crossfitbeeshark.ro/app/webroot/files/userfiles/files/bepenajarivav.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606de3577198e---56055536098.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=sdg+10+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA29 14856 bytes
SHA-256: eae849647c4388d84c35f0fb924f8bdaf89fd26d845a59cedc88c50d7c43e7be
font_01_sfnt_off0000df5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5E 9900 bytes
SHA-256: efc71873bf2af6264ffadf2e24669d963009070f78e9b5cd7db7ac1f5fbb5960

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