Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a729e9af5f63afc…

MALICIOUS

PDF

67.0 KB Created: 2021-06-28 16:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c0b4314ed1a2ac42883eefb5cdee1e50 SHA-1: e10b64cc564cf71f956678f235b6dc9266d13131 SHA-256: 2a729e9af5f63afcd5c43913e4d735b9ce3b1dfb21b1a0447c7d7ec7b0b9ca8e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links to various websites, many of which appear to be compromised or disposable hosting. The ClamAV detection and heuristic firings indicate this PDF is designed to lead users to malicious content, likely for phishing or to download further malware. While no scripts were explicitly extracted, the nature of the link farm suggests an intent to redirect users to malicious sites, potentially leveraging embedded JavaScript within the PDF structure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4988

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 https://irlanc.ru/uplcv?utm_term=coc+town+hall+7+war+base PDF link annotation
    • http://celcg.pl/uploaded/file/gubedeforitezepala.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/72697007021.pdfIn PDF document text
    • https://mvpartners.be/images/uploadedimages/file/87647459181.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607a015ecc0d3---jigeginezodezilaxisixebos.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608785c515554---gapedirotapexanal.pdfIn PDF document text
    • http://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/bakuzuwekatawu.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be0f539eea7---26946140913.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/766a044e21ec2b1dd6dd7e50327b3dae/84427456769.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/6b7c6e084a9ef5a45ca98b4e923073fe/91235275407.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/a1481b94c47a7fced77046088d92b18b/2854250478.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c20153ba407---56106661653.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/54650954909.pdfIn PDF document text
    • http://vasvaripalmuzeum.hu/upload/file/nugosenifuzidiruzinixofe.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/gqgsucoordej09brlnc4n78a6d/wogiw.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c48f505d634---nabuvasafidu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/6f0d8277b6f851ad7ead7e91872a6437/nopufejubosewoj.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2c4472a3e4---bumes.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/be639id0vtlm0v4tcfgpg6a6hb/vibitonoxekokef.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/nanunoga.pdfIn PDF document text
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f18045a42---dirowajijefazipegozok.pdfIn PDF document text
    • http://www.nandomoraes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c718e02a02---30523276274.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609329b57e148---64878861916.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/88461157648.pdfIn PDF document text

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