Malicious PDF — malware analysis report

Static analysis result for SHA-256 f081c412375fe4b8…

MALICIOUS

PDF

56.2 KB Created: 2021-09-09 17:37:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 418fd60c80ad43665c049af77c2d58a3 SHA-1: 5d012a09a6c02b586edc4386b925027aca000dae SHA-256: f081c412375fe4b8dca552a38a7aa52a078da11ff5d59cf4f4e49e1be972d945
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a significant heuristic identifying it as a link farm on disposable hosting. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution through these links. The sample's structure and the presence of multiple unknown URLs suggest it's part of a campaign to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7115

Heuristics 4

  • 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.
  • 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://tipsclubcr.com/campannas/file/betezilano.pdf In PDF document text
    • https://worldpigment.com/image/upload/File/papiwamaveru.pdfIn PDF document text
    • http://npcbalkan.net/ckeditor/ckfinder/userfiles/files/jojepirulogedudesutum.pdfIn PDF document text
    • http://cross-winds.in/upload/contents/images/images/24594534488.pdfIn PDF document text
    • http://contextuae.com/resimler/files/vajilaxexufub.pdfIn PDF document text
    • https://norservis.cz/files/files/sekitu.pdfIn PDF document text
    • https://hondaotohaiphong.vn/upload/files/2492492515.pdfIn PDF document text
    • http://aczelzalog.hu/tmp/wugukimebokoze.pdfIn PDF document text
    • http://cortocircuito.trialpanel.com/images/Upload/files/gimavolukok.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/kosunojarowu.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/damegi.pdfIn PDF document text
    • http://netisiletisim.com/guvennet/resimlerfiles/zipawolumu.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138d678bcad4---zilovudaxemik.pdfIn PDF document text
    • https://vilnius.cvzona.lt/resources/img/files/3833998805.pdfIn PDF document text
    • http://massintech.ru/img/outer/files/30936787906.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/hqvj2gn8amc433c1mn8g8gujf0/24906205593.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/36486168285.pdfIn PDF document text
    • http://telegid.tv/userfiles/file/90328656698.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/98888414866.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=video+downloadhelper+android+chromePDF link annotation