Malicious PDF — malware analysis report

Static analysis result for SHA-256 df71aa9e2b5c20d5…

MALICIOUS

PDF

62.3 KB Created: 2021-09-04 07:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5ad9b9701fe22b9b68159260ab7110fe SHA-1: 98559825c425f6302b5b928476d75d1d323f172b SHA-256: df71aa9e2b5c20d5374fa3011b7b4beeb4bbdc0925e6444b55602c776924bacb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. This script likely facilitates the redirection to a link farm, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous unknown URLs. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4857

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://hotelindigha.com/FCKeditor/file/26784214063.pdf In PDF document text
    • http://sitoad.com/bbqjoekey/files/202107061411288253.pdfIn PDF document text
    • http://mlead.net/images/e/file/visevuje.pdfIn PDF document text
    • https://www.vasutaszeneiskola.hu/ckfinder/userfiles/files/10081989378.pdfIn PDF document text
    • http://fontanarosaserigrafia.it/userfiles/file/37349484205.pdfIn PDF document text
    • https://norservis.com/files/files/pujodedisigape.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/nexigizilose.pdfIn PDF document text
    • http://everbeenmagnet.com/js/upfiles/files/mixoborex.pdfIn PDF document text
    • http://gptools.net/userfiles/file/tiwibujefajazulawe.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c00b80670---ziwifej.pdfIn PDF document text
    • http://dentherapia.hu/files/file/bufobupovekekis.pdfIn PDF document text
    • https://duhocblueocean.vn/ckfinder/userfiles/files/52002635271.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/28684008737.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/34186086876.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/34084269648.pdfIn PDF document text
    • http://allseasonsart.com/uploads/fck_uploads/file/fegevevabupaxe.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/25438947973.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/3420951832.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/71748642104.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/kulenojitapafabeza.pdfIn PDF document text
    • https://vpntraffic.com/upload/files/vabix.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/juxofuguxete.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/fuzara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=vector+analysis+pdf+by+schaum+seriesPDF link annotation

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