Malicious PDF — malware analysis report

Static analysis result for SHA-256 57d1584d9ed3d071…

MALICIOUS

PDF

93.7 KB Created: 2021-07-17 09:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 88b963d69a2d290a20bc6ccc2a9239a0 SHA-1: c66ca82a7bfc4d2db9d26ee4d891cae65e98f1d2 SHA-256: 57d1584d9ed3d071c90d89891b70bcf39cab41414653074295c9356463ce6f8b
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6057

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://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a02f9651ad6---midebebire.pdf In PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad3ce83466d---tubikopugenotemidelevimej.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/18861791160.pdfIn PDF document text
    • https://hgb.se/filer/file/gikenixi.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a65cb755017---64811778665.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/widuwozeparenetodoxe.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/lowoditelikakipigi.pdfIn PDF document text
    • http://ronniejoymemorialfund.com/clients/1/1a/1a75100f29d804137a154ca93ef51a80/File/dijozipobupu.pdfIn PDF document text
    • http://oasis-inwaste.asia/files/file/67532582986.pdfIn PDF document text
    • http://railwaysrailroads.com/upload_files/files/85991174439.pdfIn PDF document text
    • http://oticonshop.net/ckfinder/userfiles/files/kuwiwe.pdfIn PDF document text
    • https://benjamindreyer.com/wp-content/plugins/super-forms/uploads/php/files/ecab99c46474ab021049b32d339278f6/46285331686.pdfIn PDF document text
    • http://dytac.hk/userfiles/sojetozubot.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/f6e9dde38ee5658dc9e29877e14e56f6/kufulab.pdfIn PDF document text
    • https://educhina.mn/editor/files/desodulaliridakuxovewiziz.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/dofnah3uinkdr754lht1sj8ft2/lupoliwesuza.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/62062104595.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/9be0fe1ac606b542040d8d9d6176aa5e/ravekujewamelitanaki.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/5gvqioml0qvluc1m76piuetkg7/nanatifedatutusazo.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608646226ed3c---teginig.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896f24c741d---jabozomum.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/mjdnb0sj38rvugj0goab5nni57/11938576201.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c444c8c3101---79591573900.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/50376304754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=accent+in+english+keyboardPDF 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_off00013134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13134 10976 bytes
SHA-256: 99283186b97b4638a7f145644d7c3e8b867f56f8c680df1ee1e8e3cf2d31cfb7

Open this report in the interactive analyzer, or submit your own file for analysis.