Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed0564cb867fae1…

MALICIOUS

PDF

151.2 KB Created: 2021-06-22 21:43:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c4ce989ff5e33b9de6b594f9955e43ba SHA-1: 1a2aa1d19424eddf009dd1f93a7e95c75c8506d8 SHA-256: 0ed0564cb867fae1f18d8444b64d34ada609194da05b3c8951a34f16f2f61eb5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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://tradeweb.es/userfiles/file/98227471271.pdf In PDF document text
    • https://bilegt.mn/userfiles/files/nokorezofawusevexuxipu.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/29200863324.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/54565025709.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/fugugekeremujigefisa.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b53274062f2510f3ccf5aadc78b77971/96842785045.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/3m41ubkredhlb2dfdi85a0pg20/59697006595.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/d92eff19c7f780fae7892378fef2ff1d/timamutewatolarigiwat.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607051b18ab70---97863780566.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/dezivatonodovob.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/26578173303.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/3qsic8hva8r0npfsm0q51rk8r2/nawuxejeziputewumuzawari.pdfIn PDF document text
    • https://fundreamz.com/ckfinder/userfiles/files/56013711456.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/324bcc33cd856cfae982e4e9e7a3137f/48656535245.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/bifodefokosafefuxovulose.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/7d3899320549259e3995d2dfe850ee55/gitekeporuvebuwejun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=chapter+3+practice+test+geometry+answersPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23113 5580 bytes
SHA-256: 1bba8d385f2860d4f33e846b347ffd71fe3157d156cc9a6b1de9d4078ae9aabf

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