Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8a996b6fd3c4981…

MALICIOUS

PDF

47.2 KB Created: 2021-09-18 07:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2148be31bb8843feec40731ec7f4f723 SHA-1: 1b0015252ae0bbf38ab622845047fa8d533c6f72 SHA-256: c8a996b6fd3c4981f578bf829cfe39bf6b1888e705fa4f5df9aa5d970949e54f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to suspicious domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6966

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://tayles.com/uploaded/zapabowa.pdf In PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/jiworugubulix.pdfIn PDF document text
    • http://esebtekstil.com/resimler/files/14129039146.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/runavajilezupatalogolod.pdfIn PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/95482328085.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/buvupafuzeguvidi.pdfIn PDF document text
    • https://eastmangroupllc.net/ckfinder/userfiles/files/lafila.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/53018457701.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021090613071073499.pdfIn PDF document text
    • http://kmjmt.com/news/upload/file/2109020822575474268j3j22.pdfIn PDF document text
    • https://clubesolbra.com/uploads/files/wusiwuxijaji.pdfIn PDF document text
    • http://lammermoor.net/imagenes/file/wilubikerifuxuxugu.pdfIn PDF document text
    • http://ingore.cn/upload/files/45198045038.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328234c6593---1166660485.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/noxedeziwoguju.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-15/20210915205538634152.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/75653439729.pdfIn PDF document text
    • http://pointerboards.com/uploads/admin/files/fububilalus.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613705136dd94---81088111564.pdfIn PDF document text
    • http://timebymtm.com/upload/files/9393444568.pdfIn PDF document text
    • https://currenwatch.myhost360.cn/file/upload/files/09-02-03-19-26-91.pdfIn PDF document text
    • https://mentormedya.com/files/76047324876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=play+audiobooks+on+androidPDF link annotation