Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c0be3fb26d6fd72…

MALICIOUS

PDF

61.6 KB Created: 2021-09-17 01:50:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 7d1927b78101e3d70dbe0b7cabf31395 SHA-1: 9680464b644187f136e59415b8727c7d0e65d677 SHA-256: 2c0be3fb26d6fd7243abaa746995e5717bc8fe672ae8c03f356c1045a9640479
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high score strongly indicate malicious intent. The document body is heavily obfuscated, preventing a clear understanding of its direct purpose beyond link aggregation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8187

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 http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///jigelojag.pdf In PDF document text
    • http://drzwiukryte.pl/userfiles/file/22573870330.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/faxoxasubaravu.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/fomorudapufivorazamofajol.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/31097445626.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/3141925929.pdfIn PDF document text
    • http://nt-module.ru/ckfinder/userfiles/files/22795232131.pdfIn PDF document text
    • http://soeurs-scjboran.fr/soeurs/upload/files/91916947869.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog/file/monigasevet.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/54369893819.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/40438605750.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613fa08912765---99491031318.pdfIn PDF document text
    • https://makojudo.pl/zdjecia/fck/file/37543049760.pdfIn PDF document text
    • https://sitarasign.ir/data/file/90170627917.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/1934980569.pdfIn PDF document text
    • http://thongthien.vn/upload/files/46260463241.pdfIn PDF document text
    • https://ctapigroup3.com/contents/files/53468462245.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/lazomufeziresozojivutad.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/bepoberajupof.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/31ea2a60a27c65028666023080e8a1da/62524736569.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16143c897499ff---jigageguwigegeduzeneku.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/f6fc1aa4ac25e04e49e1eafff8662955/7879952963.pdfIn PDF document text
    • https://sealordhotels.com/ckfinder/userfiles/files/junosop.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///mumidilo.pdfIn PDF document text
    • https://yenicekentkaplicasi.com/userfiles/file/nexaver.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=push+and+pull+marketing+examplesPDF 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_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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