Malicious PDF — malware analysis report

Static analysis result for SHA-256 282c7cb4ba01e809…

MALICIOUS

PDF

63.3 KB Created: 2021-09-29 01:44:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2da64563433c6f6565cd887c6aa9e3e7 SHA-1: cbee4c688e87db62441646f4145f64e69b30f309 SHA-256: 282c7cb4ba01e809fd4cf08a41bd4c2eef59214e3a882f71946aaaef9b4fd101
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to obscure the ultimate destination. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external URIs and the heuristic firings point towards a malicious document intended to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3110

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://elsa-daulte.com/ckfinder/userfiles/files/bekenadelutido.pdf In PDF document text
    • http://ecohost.ru/pics/images/file/40092745067.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/zowarefixevujawosixe.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/zisisewesusufododazanuxu.pdfIn PDF document text
    • http://korea-seals.com/ckfinder/userfiles/files/5615974209.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/8702160574.pdfIn PDF document text
    • http://hichipper.com/hichipper/uploadfile/file/2021090805272973499.pdfIn PDF document text
    • http://alrabbanoilandgas.com/file/files/28709909406.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc62ad196a---78392970855.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/gatisugisasokip.pdfIn PDF document text
    • http://sb555.com/photo/file/senofuj.pdfIn PDF document text
    • https://inprovitbrasil.com/ckfinder/userfiles/files/gajesunegifewasajuzetib.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/1810063024.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/fakawunilidazuku.pdfIn PDF document text
    • http://cx-gl.hu/images/files/39971883105.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161443bdab4f84---sukibifopitif.pdfIn PDF document text
    • http://www.bordadoindustrial.com/ckfinder/userfiles/files/30321849990.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/semokamovesu.pdfIn PDF document text
    • http://studiotecnicoprato.eu/userfiles/files/pulexudetazopedotijulole.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109201519573986.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/79003895462.pdfIn PDF document text
    • http://sindikat777.ru/ckeditor/ckfinder/core/connector/php/uploads/files/67009898144.pdfIn PDF document text
    • http://thegioioto.store/upload/files/28860137726.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/mugisafobetenokiso.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140e85d96873---riregub.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/74073946011.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=install+music+paradise+proPDF 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_off0000b36b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36B 14724 bytes
SHA-256: df560b9d5893b6a376e16f949615615d4884b8d58482e86f197e5ed3a091e972
font_01_sfnt_off0000d82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD82E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1