Malicious PDF — malware analysis report

Static analysis result for SHA-256 27755517469ea26b…

MALICIOUS

PDF

86.6 KB Created: 2020-11-23 18:43:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ef7c03e0f8c80a1d03e178d9f6e35b74 SHA-1: e94cbbdffc06e97ce4c8617a005da5babb035819 SHA-256: 27755517469ea26b720ffd97e589f48c8c0b884b74fa21d2163adc844e3e4b71
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure related to 'Naruto shippuden 223-242 summary' which is likely a pretext to direct users to a malicious URL. The heuristic PDF_SEO_LINK_FARM indicates a large number of external links, and the ML_NYX_PDF_MALICIOUS and ClamAV detections confirm malicious intent. The primary malicious URL identified is trafffe.ru.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9521

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://trafffe.ru/strik?utm_term=naruto+shippuden+223-242+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4449781/normal_5f9ea25c0e53f.pdfIn PDF document text
    • https://jugizefabugej.weebly.com/uploads/1/3/4/3/134377355/nigofapusutowajo.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/5887223.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/8abc429.pdfIn PDF document text
    • https://lelidejob.weebly.com/uploads/1/3/4/6/134643066/lamilalanek-wuvan.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/lg_universal_remote_akb72915206_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26d500e2-38b4-4883-83a7-84c266d375fe/nanuxotumuxugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78f50ad-1ff4-4bb0-9a08-9a95dfc6cc39/fikid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4dc598c-5d90-42d1-942e-71d4d5476fbb/virtual_image_definition_physics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4631b5ec-42d0-43b9-ace5-bc7eab9c5c02/i_can_t_edit_my_google_site.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad24ddaf-52ad-4d2e-ab12-c5f13e7b9d08/66209025418.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/berizimokuwel.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/science_reports_impact_factor_2017.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B35 21220 bytes
SHA-256: 6cee0f24a4352cdda706bba3cc4d7b164edecc27ba1f3a49dbc3a98575daa19f

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