Malicious PDF — malware analysis report

Static analysis result for SHA-256 e113a267b7c45001…

MALICIOUS

PDF

59.5 KB Created: 2021-10-18 18:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7ad07f66a17dd62ba4bb8a306e8215d8 SHA-1: 8d41cc4fb2d6ec1d442a909c443d0d94c8dc6ee1 SHA-256: e113a267b7c4500156b68e97f4ef21212ed7a0b4a8139eb8e7ce4dd0129e3c87
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. The presence of numerous embedded URLs, many pointing to potentially disposable domains and structured as link farms, suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, originates from wkhtmltopdf, a tool often used to generate PDFs from web content, further supporting the idea that this PDF is a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8696

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://brixtontaxi.com/survey/userfiles/files/gowelalitu.pdf In PDF document text
    • http://ntep2008.com/UserFiles/File/29941970461.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/19377344654.pdfIn PDF document text
    • http://xindeshiye.com/uploadfile/file///2021091618473333.pdfIn PDF document text
    • http://modernplating.com/userfiles/file/25385031052.pdfIn PDF document text
    • https://impactmediaresources.com/userfiles/file/sufetetafidepavetogu.pdfIn PDF document text
    • http://tantex.org/tantex/tantexuserfiles/file/1929081854.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/64295948627.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/xixexubowopelojarugizaker.pdfIn PDF document text
    • http://bagodilovaspark.hu/userfiles/file/wuliramedegisamefef.pdfIn PDF document text
    • https://oazapiekna.com/zdjecia/fck/file/17993676416.pdfIn PDF document text
    • http://hcm-invoice.vn/hinhanh_fckeditor/file/96095981151.pdfIn PDF document text
    • https://xn----7sbeo1acdy3adh.xn--p1ai/userfiles/file/21535638791.pdfIn PDF document text
    • http://yanartekstil.com/firma/files/doninizotegobafiz.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/34148344437.pdfIn PDF document text
    • http://stroykap.com/application/views/stroykap/userfiles/file/6201277169.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/18591903460.pdfIn PDF document text
    • https://bizimpin.com/calisma2/files/uploads/5232000169.pdfIn PDF document text
    • http://scuolascifondocortinadolomiti.it/userfiles/files/67301666735.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161368377d1a36---25718947858.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/vejamuwolam.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/3761725326.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/23D8k0Ec_6w/uplcv?utm_term=case+with+multiple+conditions+c%23PDF link annotation
    • https://www.posluh.hr/ckfinder/userfiles/files/melijezeviwevaju.pdfIn PDF document text