Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f3b56047b23b2dd…

MALICIOUS

PDF

68.6 KB Created: 2020-12-30 23:15:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8cd1ca1a49b51458b9baeb027d926a69 SHA-1: 786142c56e632fc5d7004c314d6f28bcccef7eb6 SHA-256: 6f3b56047b23b2dd5e716a0401f13fb9fbf6c393deb15463a47f03bad7e5cac0
154 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating a link farm with external PDF links, and one of the embedded URLs is associated with a phishing lure. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8149

Heuristics 4

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/strik?utm_term=status+video+malayalam+download+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412158/normal_5fd6610b57a97.pdfIn PDF document text
    • https://cdn.sqhk.co/boxokozofe/bwHFggl/dead_frontier_xl_gunner.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410432/normal_5fe1eb45ced26.pdfIn PDF document text
    • https://cdn.sqhk.co/jemajujo/ghaa0ic/zozufofumegawa.pdfIn PDF document text
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/waxavutano.pdfIn PDF document text
    • https://kovepezerolozu.weebly.com/uploads/1/3/1/4/131483153/nixazesixexi.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/vonugumazagusu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5f959aefe05a7.pdfIn PDF document text
    • https://cdn.sqhk.co/vigesiji/lghhejd/never_have_i_ever_netflix_rating.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/epAtqhj/powered_subwoofer_bass_tube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jevelel/4248937200.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/28040533821.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/teacher_attendance_form.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 5292 bytes
SHA-256: b77392308b3947136df7ed8101b428a380bc54f953418dbc2abedc628320cf5b

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