Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d143e03259bd6d5…

MALICIOUS

PDF

46.8 KB Created: 2021-09-28 16:50:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: dcb76fb87fee579a6a8d480fcce14f29 SHA-1: 8adf577f91d4eaf954236c8a538dfd271d0b4fa6 SHA-256: 4d143e03259bd6d588e2b5040dada5f270e5596af411b5c5fea31224fe1075ff
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8301

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 https://oniceh.ru/uplcv?utm_term=photo+editor+app+android+studio PDF link annotation
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/babise.pdfIn PDF document text
    • http://china-baby-clothes.com/d/files/gunope.pdfIn PDF document text
    • http://tokstar.com/_UploadFile/Images/file/pukimexetepemolufajowa.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/36379241862.pdfIn PDF document text
    • http://www.louisianarebarcontractor.com/editorimg/file/zivedijo.pdfIn PDF document text
    • http://master-br.ru/img/file/19983644462.pdfIn PDF document text
    • http://www.travelwithtaangoo.com/img/file/74405324278.pdfIn PDF document text
    • http://marchmont.ru/imgs/file/25762368717.pdfIn PDF document text
    • http://agilesolutions.in/uploads/nifafufexejetamigug.pdfIn PDF document text
    • https://sardiniagreencoast.com/userfiles/file/vonasukowogamufokipap.pdfIn PDF document text
    • https://www.znackakvality.info/files/14803524311.pdfIn PDF document text
    • http://ccforum.kr/uploads/file/1630787534.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/2854838473.pdfIn PDF document text
    • https://vnycc.com/userfiles/file/43929106180.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/vudedino.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/18778509150.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef4f6055f6---julutoma.pdfIn PDF document text
    • https://diamond-marketing.cz/soubory/1630426089.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/79325961059.pdfIn PDF document text
    • http://geasit.it/userfiles/files/34885950100.pdfIn PDF document text
    • https://www.theoakshealthcare.com/my_content/js/ckfinder/userfiles/files/73989655989.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/wulafuvamesuduvexesaxi.pdfIn PDF document text
    • http://ex2010.com/uploadfile/file/2021091519214773499.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/gemupibevo.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210921095744.pdfIn PDF document text