Malicious PDF — malware analysis report

Static analysis result for SHA-256 501125e5ab748510…

MALICIOUS

PDF

144.0 KB Created: 2021-07-30 07:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7bb5cf525c42dfe2e6b8299a0b2637cc SHA-1: 8bfdb5edbd6eb7ddb8ad23ef0d65fa6d25e46837 SHA-256: 501125e5ab748510a057e765f14cf573f2334b41a0400e772384b9303ddaad8a
154 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, suggesting it's not intended for direct user reading but rather as a container for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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://tele-video.ru/upload/files/vifisusiwivoxopu.pdf In PDF document text
    • http://sbox-technology.com/upload/datoteke/kitojuwisokowuzobixubuxat.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/8f18290b59ed9b7efcd2a1cd01d8d5da/lobuw.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc9dd2c758---56435856864.pdfIn PDF document text
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160984c2677756---fenuw.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/47104060493.pdfIn PDF document text
    • http://ecofincas.net/ckfinder/userfiles/files/zejupogijuvoji.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/foxewovepetaw.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f512dc212e0---50364474630.pdfIn PDF document text
    • http://bienbao.net/uploads/files/gumotunoguvanekokomatuta.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609461705ddec---pedawarowageza.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/b862d0e0b42741b271ae737f402bb91b/faxekeparix.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160926d7a02bd5---31712665468.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607321bd98bcf---zuziwidixotokuragiwix.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160bad9fc9a611---vuzubo.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/vijixawofuxesavo.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/76544990760.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/db42a3bd7bf249b627c4fcb9989951fc/30743485905.pdfIn PDF document text
    • http://cutencuddlybreedables.com/_images/file/97288237686.pdfIn PDF document text
    • http://nhadephoanhao.vn/upload/ckupload/files/68975049258.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210714_132907.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/5532194369.pdfIn PDF document text
    • http://ttccid.com/userfiles/files/sewala.pdfIn PDF document text
    • https://dpt-mh.com/uploads/news/files/xunuwugekafijoruxorep.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/80770416656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=megaman+zero+cyber+elf+guidePDF link annotation

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