Malicious PDF — malware analysis report

Static analysis result for SHA-256 761f94a3ee2af3bb…

MALICIOUS

PDF

47.5 KB Created: 2021-09-26 01:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 672c73316ab3692cb18bef11aac26d4b SHA-1: e3afda8a483c123866857759acacfc5f4f24258d SHA-256: 761f94a3ee2af3bba787cf32668bc1c65c5bfaed7de3d6819e4ecf7ab5bf99b9
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities or redirecting users to malicious sites. The presence of numerous external URIs, many hosted on disposable domains, suggests a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6966

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
  • 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 http://sm300159.agchost.com/userfiles/files/77775019595.pdf In PDF document text
    • https://vaynhanh365.net/contents/files/gerav.pdfIn PDF document text
    • http://naasschoolofmotoring.com/fckeditor/userfiles/file/45866347929.pdfIn PDF document text
    • http://amsaneeraus.fi/userfiles/files/timosijixalegipejukol.pdfIn PDF document text
    • http://greenld.com/userfiles/97763648073.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/7360516555.pdfIn PDF document text
    • https://transturist.ba/ckeditor/ckfinder/files/files/fuwojikovosubimivu.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/98d01a88a899f0a6fc8a6394f555b0bc/65146386002.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/51963735996.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/60774356663.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/69142264279.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/74270014971.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/32316865567.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/75281712999.pdfIn PDF document text
    • https://beauti-full.ru/uploads/files/71847303416.pdfIn PDF document text
    • https://bonvoyageindia.in/ckfinder/userfiles/files/58979858659.pdfIn PDF document text
    • http://asqcert.net/files/files/99041792439.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/vubusosetumasu.pdfIn PDF document text
    • http://lagrupacio.cat/file/bavufok.pdfIn PDF document text
    • http://www.erealitysolutions.com/tennisontario/assets/appsadmin/js/ckfinder/userfiles/files/bexedelixoporuxawejima.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/funujakipitutixepenik.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/radibasumavebolopobisek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=pran+comics+pdfPDF link annotation