Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1d4e83275fbcbc…

MALICIOUS

PDF

63.6 KB Created: 2021-08-27 22:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: a876cb27cf82ac7ad5024ae2f6840be9 SHA-1: 0a3d39d184f406e065838a7aae4a9004ab3d7a95 SHA-256: ef1d4e83275fbcbc529c5ef95589f90d5df8ee2baf857cb515a526d8ae18bc86
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating it is likely a phishing or malware distribution lure. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The heuristic firings indicate the PDF is structured as a link farm, likely to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7061

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://huntic.ru/uplcv?utm_term=lie+with+me+full+movie+online+free PDF link annotation
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea6ce553bd---42151868606.pdfIn PDF document text
    • http://przychodnia-felinskiego.pl/uploads/editor/file/baxidom.pdfIn PDF document text
    • https://manusingh.org/scgtest/eec-new/codelibrary/ckeditor/ckfinder/userfiles/files/69723864350.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/kujigodikadejenij.pdfIn PDF document text
    • http://comp-art.ru/userfiles/file/zitufazorazizezud.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607de1a974e49---41987836800.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/07od79kjbos5v6mbhhdc0pvnac/zixubagatuvamidedotopoj.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608646b5e040d---25099135138.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/35d12aa22f26e55623dd8155016ea6cb/tegudew.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/c559b798fed34ffbb969b2cf77f0345b/dufupilakudizu.pdfIn PDF document text
    • https://bor-diing.com/upload/files/72899156493.pdfIn PDF document text
    • https://unserbiokorb.ch/userfiles/file/padaxaf.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/fdc2a14fdeb27494079de73c820124ce/ragunugagutenipafexuj.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/580d92bac5cba154bd9c8ddc642326f2/17025345148.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/64252874718.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/b33aee7ef484f1a2706c1398c26dd6e2/49951608667.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/xunutatedasenorogokepu.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b5f0fdea14393518010c0bc7671e6105/60245675518.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/15056514143.pdfIn PDF document text
    • http://scamps.biz/userfiles/file/guvokakojokexetaxogi.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/38582878932.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/wumeriridesizu.pdfIn PDF document text
    • 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_off0000b60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60F 10360 bytes
SHA-256: 9766636d924ba942639a50807cef3203bbd8b6ba65f62f44b1fa2c68db8e92bc
font_01_sfnt_off0000cd42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD42 14948 bytes
SHA-256: af28950bdca8e9529e96a295e398024850c5848ab2240705f6f8b0b40bc04571