Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e96c8bc01b7a971…

MALICIOUS

PDF

38.6 KB Created: 2021-10-01 14:54:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 12c7a990b721d233014c29f14221d5c5 SHA-1: a4b0030feafddf4e471d097c5c93cc4a92145214 SHA-256: 8e96c8bc01b7a9716956199d60b9c431bdbbdd65938b51a576a19384f8c99e37
152 Risk Score

Malware Insights

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

The sample is a PDF document containing embedded JavaScript, which is a common technique for delivering malicious payloads. The PDF also exhibits characteristics of a phishing lure, with an image-only design and external links, suggesting an attempt to trick users into interacting with malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8504

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7699917f4---30986465324.pdf In PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/xusokarenu.pdfIn PDF document text
    • http://ozona.pt/js/fckeditor/editor/filemanager/connectors/wysiwygfiles/file/sakaziko.pdfIn PDF document text
    • http://haki.tincorner.com/uploads/files/64162082984.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/watumanozazajajar.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/ranabo.pdfIn PDF document text
    • http://jubangh.com/Upload/FckUpload/20210921file///foxaxikopifapixogivopaxel.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615181a4ccbd3---65494085973.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/retebefepomesovo.pdfIn PDF document text
    • http://giasudaihocsupham.com/Images_upload/files/92466652854.pdfIn PDF document text
    • http://zavalinka.by/var/upload/file/sibejewofolom.pdfIn PDF document text
    • http://qdjshg.com/files/file/xepefuzewuwofiwirozus.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/nibajelexupu.pdfIn PDF document text
    • https://olterus.info/contents/files/nunugatugopobagilu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=tao+te+ching+stephen+mitchell+pdf+freePDF link annotation