Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd797b2ccc49980…

MALICIOUS

PDF

61.3 KB Created: 2021-03-22 03:17:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fbde3608453500b1659f614e3c4bb9d SHA-1: caa12a9ed8078aa1481002cfc4da3cd9ac3a93ae SHA-256: cfd797b2ccc4998036bad9ee3a2514a6fd13e7e35eed22d860dd3049135f2a00
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity, potentially involving JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://zajinet.ru/award?keyword=certified+accounting+technician+reviewer+pdf
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/nujadezu.pdf
    • https://kerijifulonuf.weebly.com/uploads/1/3/5/3/135328136/wepofidepuruxeveranu.pdf
    • https://fugogifozu.weebly.com/uploads/1/3/4/8/134888696/5962352.pdf
    • http://copyrightnotices-form.com/personal_budget_spreadsheet_td_canada_trustffx0y.pdf
    • https://falukanujenujo.weebly.com/uploads/1/3/2/8/132815213/8571904ed4c4b9.pdf
    • https://kololopobiro.weebly.com/uploads/1/3/4/8/134853362/8416047.pdf
    • https://sujujiga.weebly.com/uploads/1/3/1/3/131379538/loxususuvezavo_megudojufigoluk_pafakuradaf.pdf
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/29e4c02e529ef.pdf
    • https://wujuwali.weebly.com/uploads/1/3/5/3/135326068/piletipetilifa.pdf
    • https://sakolepak.weebly.com/uploads/1/3/4/5/134588428/f0433.pdf
    • http://hugertely.xyz/5e_weapons_magic_items_homebrewl9g35.pdf
    • https://telefaxukewinet.weebly.com/uploads/1/3/4/3/134320065/4344959.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/40c748f0-53ba-4c95-8c38-173532f70935/98509318507.pdf
    • https://s3.amazonaws.com/xelimewat/how_to_repair_ibm_selectric_typewriter.pdf
    • https://uploads.strikinglycdn.com/files/2e97b6c0-1e6d-4d2b-8289-81607bf2a560/fundamentos_de_marketing_stanton_william_13a.edicin_mcgraw_hill.pdf
    • https://uploads.strikinglycdn.com/files/0c80955f-d6c0-422e-ac55-dabeae58cc4f/18105159386.pdf
    • https://uploads.strikinglycdn.com/files/171e28ab-5e2f-40c1-92c7-28d9e2d1856b/roomba_500_error_codes.pdf
    • https://s3.amazonaws.com/vavabi/hamilton_beach_48464_coffee_maker_manual.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6b5.bin
fa1c78fbc3c1e02a06d1a5f347006e64e41706b918c5b7f96895ebdeb30442be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 5264 bytes

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