Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d1fb2507fa0ffb…

MALICIOUS

PDF

70.7 KB Created: 2021-09-06 00:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 27320bb703990218cc33b612461823d8 SHA-1: ffd09f99c06ea49446b0b30708f81b98422c2e3f SHA-256: c6d1fb2507fa0ffbb85fb761e7fdb4ced8fa74a0ec31104c57b529ea7df88ba3
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7402

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://mimpishio2.net/contents//files/disujowabonifedizebagurim.pdf In PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160d21c17ab078---wekalopituruzagidizegibak.pdfIn PDF document text
    • http://zonwering-nederland.com/ckfinder/userfiles/files/gifab.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/aac172c5bdd6a7b9540f1a1855e1c5d6/jazusanawetomi.pdfIn PDF document text
    • http://sun-eko.eu/files/file/57232885387.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/3f4801ee117d24345d3d0840daf792ef/15959515343.pdfIn PDF document text
    • https://moscreen.in/cmsfiles/file/wixinaxupulugepigax.pdfIn PDF document text
    • https://datajournonepal.org/files/sutemarefegoriwe.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16076d9daf04c1---litejunidopiwiraruwu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/77992443955.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610af9a60870b---88442804233.pdfIn PDF document text
    • http://amctop.com/board_data/editor_img/file/202105150945.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c997b292cf3---navekabewop.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/fezikigad.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/4639868799.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077b1e05ae16---fizewogesexasox.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/rugokiragawizonon.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/3dfa4fb6d573e87a0cc8a14d69befc61/34446869043.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/11664183272.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/tejibezosovuwozonuxopoju.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/70715666300.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/fivotazorefexadorigomo.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210703173417.pdfIn PDF document text
    • http://heizler.hu/files/file/riwenulajejewasigag.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6ea421ca---zonaxopogilanojar.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=personality+and+self+concept+in+consumer+behaviour+pdfPDF 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_off000105f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105F7 11308 bytes
SHA-256: 61b3d278a42defb442aec2a2e35da64d9630aaee8a1dfb438377af9298b1a535

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