Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8bc29bca287d45d…

MALICIOUS

PDF

84.5 KB Created: 2021-09-02 10:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e1ce0388d81e10212e9cb14d17258340 SHA-1: 5a49bd1ed152ce602c142c3fa54ec15e6ea1c796 SHA-256: f8bc29bca287d45dfc002c6ff13dd97855874d2cabc81fb0e7d4fa3cc099cfad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and ML classifiers indicated maliciousness. Heuristics identified it as a link farm pointing to numerous external URLs, with several hosted on compromised WordPress sites or disposable domains. The document body is unreadable, but the structure and URL analysis strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7161

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://alshaabcoop.com/userfiles/file/mulolofota.pdf In PDF document text
    • https://cursosadistanciayonline.com/medios//files/poditevuz.pdfIn PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/bufafagesiserizoni.pdfIn PDF document text
    • https://chptravel.ir/data/file/77838620311.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/93943922377.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c31a6661d11---27031732284.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/85270752360.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094611f46dfa---dasav.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/t0tv2pn3agn2390dq01kq7msd6/84448689410.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/roridepogowisedesumojiw.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/d14a6eeebe6e06b7308a069a7aa7f091/vuxesetuvunipanedo.pdfIn PDF document text
    • https://ystechpro.com/nbloom/fckuploads/file/22958775131.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/93700015987.pdfIn PDF document text
    • http://worldplastsolution.com/ckfinder/userfiles/files/86277689554.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16107e9ecc9809---bezazuxilawepufut.pdfIn PDF document text
    • https://shiokuda2.com/contents//files/82885637471.pdfIn PDF document text
    • http://vanlysecurity.vn/vanly/album/files/wodidobenep.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609796b47712a---87370171153.pdfIn PDF document text
    • http://aihyang.com/userfiles/file/10966052877.pdfIn PDF document text
    • http://alexanderkanevskyartgallery.com/clientMedia/file/75141383064.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/95963996291.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/8265d20ffb61af25c30ed05c66ad49a1/bevunabanepeferuwidawaze.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/1qh0qb3i7rciq19c1454u6uekf/lapivakiremo.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c692abb26fb---fexomimulujil.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/qq5a8tlkaviuc9mvc2fu44ut36/77001676823.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=first+period+after+conceptionPDF 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_off00011a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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