Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ce2faed2e8669cb…

MALICIOUS

PDF

87.3 KB Created: 2021-09-23 11:03:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a0f9c73c35aa42786e439413144e77c2 SHA-1: ca8795256cec0cb8b3f488b48658e6cebab62e79 SHA-256: 4ce2faed2e8669cb6b97b5b55adc6d514d89e061e2ef575aa1b0b65045f21b8f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious document designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4047

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 https://smidgel.ru/uplcv?utm_term=pokemon+renegade+platinum+cheats
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451a7faf35d---88962101949.pdf
    • https://kindeeyudee.com/ck_files/files/tudotimiwilegatudirudeb.pdf
    • https://megacook.pt/site/upload/file/kijoxusul.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5fb029025---wulepuwekakowisa.pdf
    • https://casalindasbakery.com/ckfinder/userfiles/files/25974198144.pdf
    • http://vpecargo.com/userfiles/file/89835670534.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/rawan.pdf
    • http://jplus-ag.com/upload/files/BodyFile__6133CD2D61789.pdf
    • http://matstravel.ru/userfiles/file/rurubinokiwalirikikajinuz.pdf
    • https://karaari.leaddeehub.com/userfiles/files/zuwaz.pdf
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16141eb8bc80e1---wejulosemefevodavevuli.pdf
    • http://hrudolf.com/userfiles/74196265479.pdf
    • https://fu-ko-property-agency.com/webroot/editor-uploads/files/fuduweto.pdf
    • https://valleyrentals.com/userfiles/file/67264387568.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613165c838124---jajopedozu.pdf
    • https://mosconi.net/userfiles/file/tatidatisosegifi.pdf
    • http://topas.lt/userfiles/file/jopokisurixesigomenexi.pdf
    • http://hart-metale.pl/gimnazjum/userfiles/file/gezobatobibosopizaz.pdf
    • https://baoholaodong24.com/userfiles/file/27543715384.pdf
    • https://lifeteacher.tw/uploads/files/202109161558557166.pdf
    • http://n2nnetworks.com/files/others/23443140592.pdf
    • http://duplisite.com/userfiles/file/31265468583.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000113e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 16792 bytes
font_01_sfnt_off00012bfd.bin
50c0df766914b6fb59a1ac6155bef18cbf28178b1e6bc24ff37155f119403d19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFD 11156 bytes

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