Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0588964dbadb9c4…

MALICIOUS

PDF

69.2 KB Created: 2021-09-22 23:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 75f008df14d7e3ff8389ce382d48c3da SHA-1: ce538c43d9356760c16c2c2ffdbb143806811870 SHA-256: d0588964dbadb9c479baa5578598ebf5052b0a4fdc7346e482015568872cd9a4
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of external URIs and link farm heuristics strongly suggests an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6693

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://chcial.ru/uplcv?utm_term=plants+vs+zombies+2+pc+free+download+full+version+popcap PDF link annotation
    • http://cukrarska-vyroba.cz/UserFiles/File/fumuzulilotumogalomegemig.pdfIn PDF document text
    • http://ipllaser.in/uploads/bugotoji.pdfIn PDF document text
    • http://parfumland.sk/upl/jenuxodezenofonuvi.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210904113331.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/dorexepejizazu.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/pumonavawovadoporuw.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/serujiduzixum.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/nevonifopiriliduzodegoza.pdfIn PDF document text
    • http://thephinhmienbac.com/upload/files/laronofemujejuwopef.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/lewizewuzuzobebekad.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/99638459047.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/kujojererumogusidoluva.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/zafolamusefo.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/xizixomijalolikidavokoti.pdfIn PDF document text
    • https://yennenga.org/business_school/uploads/file/96634088612.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/mibebanexewawesetagu.pdfIn PDF document text
    • http://sivam.pl/files/file/xudof.pdfIn PDF document text
    • http://asclyziarskyklub.sk/userfiles/file/94903577304.pdfIn PDF document text
    • http://weifong.tw/fckimages/file/ruserifubi.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/p92snadrov3fo2nqglviiiovap/71388726245.pdfIn PDF document text
    • https://hongdung.vn/ckeditor/images/files/bugexekanoxafak.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/bff3a4d8062545e2481da6651b40db57/livilubalexunejadigunebub.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/b7b96bc727f6e18ba395ba5b4847efab/renanaxudem.pdfIn PDF document text
    • 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_off0000dae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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