Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb8c89cbdbc5010…

MALICIOUS

PDF

82.8 KB Created: 2021-09-20 19:59:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d15ee8a53d0e75be898bc268f3d3a6ee SHA-1: 014d805eb5137da070907dad0079ebe4d26871d3 SHA-256: 2bb8c89cbdbc50106f69ebf41246c09644f9ab105ffdc9a4b30828456c1afb04
124 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, exhibiting characteristics of a link farm. It contains numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to lure users to external sites. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3778

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 http://master-vin.ru/files/file/18970985209.pdf In PDF document text
    • http://elsped.hu/files/file/fetubojogofubanigep.pdfIn PDF document text
    • https://himalayanespresso.com/espresso_ckfinder/userfiles/files/76274952579.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210920_021946.pdfIn PDF document text
    • https://mcq-exambd.com/app/webroot/ckfinder/userfiles/files/49346726283.pdfIn PDF document text
    • https://questyme.ca/userfiles/file/10924486472.pdfIn PDF document text
    • http://zhouzhuank.com/v15/Upload/file/2021971156206001.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/zovedu.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/e77256c0ca4e32d85d0c3525a23df3cb/26269901451.pdfIn PDF document text
    • http://ateliergermain.net/sites/default/files/file/82366130129.pdfIn PDF document text
    • http://nwatchonline.com/userfiles/file/makoxowowiwepezo.pdfIn PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/zemidewubagowoxi.pdfIn PDF document text
    • http://himalayakebab.com/shipinc/userfiles/files/64331190798.pdfIn PDF document text
    • https://profm.hu/files/file/84873676285.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/80222667730.pdfIn PDF document text
    • http://bon-mar.com/fck_user_files/file/nibusi.pdfIn PDF document text
    • http://gearonlaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jezonoj.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/74727204092.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/91118667534.pdfIn PDF document text
    • http://winteringlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/daxidokanajinemuvirejida.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/161407572ac0ed---mebawegimo.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/161427f3056aba---dukigodilup.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/motuwumobamokisejiwiwego.pdfIn PDF document text
    • http://phanmemerp.vn/attachment/files/lobebufobixanajutakota.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=android+1+mgamerPDF 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_off0000fa06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA06 10312 bytes
SHA-256: 514b4c75570a67f1a1fbf4f3f04da5682850a9efc24cb073233a5156ab970576
font_01_sfnt_off00011104.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11104 19456 bytes
SHA-256: 0fbe9549d53b554dc0c1aea7a99c64960bbee7dd04feee6c0ef4a981571ef6ba

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