Malicious PDF — malware analysis report

Static analysis result for SHA-256 35fb7c18428ba591…

MALICIOUS

PDF

60.9 KB Created: 2021-10-05 13:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0005f855572a5cdfab54c5a1a5711b9 SHA-1: 6951d2134e2a73eafccaecd018891437e4029233 SHA-256: 35fb7c18428ba59114d68a6edd324705af1606e85d0698db7c98c260c2e9667c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to domains identified as disposable hosting or compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure suggests a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8776

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://catamma.ru/uplcv?utm_term=india+political+map+pdf+printable PDF link annotation
    • https://techinnsrl.com/writable/public/userfiles/file/74065660715.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161539285cf891---puguwibujub.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/viwanukajawanewojajiwide.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20211005031928.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16146a52815f39---nulokisewotorijofu.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/5860724058.pdfIn PDF document text
    • http://agenturamotivace.cz/uploadfiles/file/89313556144.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16329057542883.pdfIn PDF document text
    • https://managedentalclinic.com/ckfinder/userfiles/files/xibinoneje.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210907_9098A2DE2E0C7845.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/rikesadodeverakodetewe.pdfIn PDF document text
    • http://magiepourenfants.com/images/mediamanager/file/48726768274.pdfIn PDF document text
    • http://showpalmedical.com/userfiles/genunujarobelatufo.pdfIn PDF document text
    • http://gazomotor.com/allinone/file/62547620484.pdfIn PDF document text
    • http://polipadel.com/userfiles/file/xowozowulinepevejilowar.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/35135057353.pdfIn PDF document text
    • http://zekejozsef.eu/FCKfeltoltott/file/8223741779.pdfIn PDF document text
    • http://thestarbusan.net/FileData/ckfinder/files/20210902_CAE53C001E2678BF.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/17287407179.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613246bb3b13b---83801033336.pdfIn PDF document text
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/31443615869.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/dapukabupefalulupononi.pdfIn PDF document text
    • https://locktactyuma.com/userfiles/file/nozal.pdfIn PDF document text
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/69136542995.pdfIn PDF document text

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