Malicious PDF — malware analysis report

Static analysis result for SHA-256 10b40992b6b3b76e…

MALICIOUS

PDF

57.3 KB Created: 2020-11-26 01:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6832e39549d76b826bc2bf4424a8f523 SHA-1: 89a2739fa2197039e087aa73b9c8e3d58aaa4255 SHA-256: 10b40992b6b3b76e0d960947f26be4f8f8fa8df5c97d17d3874550977bcf48b4
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The embedded URL and the heuristic 'PDF_SEO_LINK_FARM' strongly suggest the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8253

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffi.ru/strik?utm_term=car+gar+zar+preterite+endings
    • https://cdn-cms.f-static.net/uploads/4471234/normal_5fa52ff5d22ac.pdf
    • https://cdn-cms.f-static.net/uploads/4369764/normal_5f9ca5dd2c635.pdf
    • https://cdn-cms.f-static.net/uploads/4371505/normal_5fbc842905a91.pdf
    • https://cdn-cms.f-static.net/uploads/4489601/normal_5fb76960ee732.pdf
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/ganoxumul-nufubawadolifi-zawabidi.pdf
    • https://cdn-cms.f-static.net/uploads/4414866/normal_5fb7d7ad10c3a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fidefofudi/54417117243.pdf
    • https://s3.amazonaws.com/dovulavavo/brahma_vaivarta_purana_free_download.pdf
    • https://s3.amazonaws.com/lodazojamuva/formula_for_equilateral_triangle_area.pdf
    • https://s3.amazonaws.com/dezajok/50873769723.pdf
    • https://uploads.strikinglycdn.com/files/e5ec9924-68c2-4a11-a7da-f2a6fea7cc60/fimuk.pdf
    • https://uploads.strikinglycdn.com/files/c9cf313c-d07a-4124-a8cc-c19d7a5c525f/maths_questions_for_competitive_exams_with_solutions.pdf
    • https://s3.amazonaws.com/bivanud/40063812306.pdf
    • https://uploads.strikinglycdn.com/files/a3377bf7-7441-474f-bbe9-42d9cb65a346/superman_2020_comic_books.pdf
    • https://s3.amazonaws.com/zirojopemup/55578721803.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c98b.bin
f17738b0c2ee9b68b55b203423a63b5f59a19edb81ff4f8320d12b26c1e9aea1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC98B 4848 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.