Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e4f6001fd02836…

MALICIOUS

PDF

64.0 KB Created: 2021-09-07 22:57:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5d02d1c43fbead8189dead55be234445 SHA-1: d1c1b370c3ed5352c8723675a1eec34a235b34fd SHA-256: 27e4f6001fd028360b3183854c92c353a85061ecceb8bf09ce5f4b2dd84ddb40
154 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The primary attack pattern involves redirecting users through these links to a final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7042

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://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/42693820101.pdf In PDF document text
    • http://isspskola.lv/userfiles/files/36657552786.pdfIn PDF document text
    • https://giolog.biz/images/bulk_images/files/89735501016.pdfIn PDF document text
    • https://31app.com/userfiles/file/gudizowav.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/99672650022.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/40f15d27f700d7e13050f06e29862df5/telilamujiguvamurun.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0647bbb481---gavuwijekibosak.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/17e9b7404103bd1ead11f841d4f2cb84/vitivuninoviwor.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/92627690462.pdfIn PDF document text
    • https://lazerom.pro/media/file/79633901340.pdfIn PDF document text
    • http://labonscafe.com/userfiles/70259941112.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/832b184e4c7f9a057430ed6af7a66d46/11446442766.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/82985865958.pdfIn PDF document text
    • http://xn-----6kcaheblih5ab0a6afqbzoqe.xn--p1ai/ckfinder/userfiles/files/gumibuzogajubalep.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/saxosumeboxutanukob.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/diwoxosefamufevi.pdfIn PDF document text
    • http://ceramvetro.net/userfiles/file/vobakigekemawonumo.pdfIn PDF document text
    • http://industrialdevices.in/uploads/junukokibanavotagin.pdfIn PDF document text
    • https://engineeredrepinc.com/wp-content/plugins/super-forms/uploads/php/files/bd04852031b2471398808622ed63b79b/luwuvigonujatow.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16091536f73319---penesuwovuvikud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=theory+of+cookery+book+pdf+downloadPDF link annotation

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