Malicious PDF — malware analysis report

Static analysis result for SHA-256 7820e7395f7cc41c…

MALICIOUS

PDF

41.6 KB Created: 2021-01-09 17:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9c4cc1fdd31cd611d355bc39e51843c0 SHA-1: 8553bb6199cd38f385ea0aa911b5026d903f74d9 SHA-256: 7820e7395f7cc41c39908c58945557b04530d8498ebbabbef5ca3eb7ecb075df
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is designed as an image lure, containing only a screenshot and a clickable link. This link redirects to malicious infrastructure, which in turn hosts a farm of other PDF documents, likely for SEO poisoning or further phishing attempts. The ClamAV detection and heuristic firings strongly indicate a phishing and redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6525

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://traffking.ru/aws?utm_term=materi+tentang+akuntansi+manajemen+pdf In PDF document text
    • https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/pivogefe_derode.pdfIn PDF document text
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/warasibafu-ninan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_5fe93c19cba71.pdfIn PDF document text
    • https://wexipemeb.weebly.com/uploads/1/3/4/8/134860193/goferobetifeji.pdfIn PDF document text
    • https://patekakedosejot.weebly.com/uploads/1/3/4/4/134479085/wenuvubumasis-faregod-kanofawemurul-kirizekibipi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5fe9ddea5389a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390092/normal_5fb772f01be28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_5fa2bbe563487.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470696/normal_5fcdd2e121191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445729/normal_5fdb97e3459e6.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/arietta_arnaut_daniel.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/backup_android_contacts_to_pc_free.pdfIn PDF document text

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