Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff214acae85ab43b…

MALICIOUS

PDF

21.6 KB Created: 2019-05-08 18:43:48 +01:00 Authoring application: mPDF 5.7 First seen: 2021-06-13
MD5: d303665f08ebfff8dcc176aec03a7f89 SHA-1: e88fe595ac329ada6c8ebd39cb21e4da7574f7d3 SHA-256: ff214acae85ab43b02f6a1ea16c5bbc2229a980592303fe99a9edbe73fa1f2f9
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified as a link farm, which is a common tactic for SEO poisoning or distributing malicious content. While the document body is heavily obfuscated, the presence of numerous links and the 'SE_DOWNLOAD_BUTTON' heuristic suggest a lure to trick users into navigating to these URLs. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://muicuiu.dumb1.com/2a05a08a00a03a05/Tower-An-Epic-History-of-the-Tower-of-London-by-Nigel-Jones.pdf In PDF document text
    • http://muicuiu.dumb1.com/2a03a09a02a04a04/The-Tower-Menagerie-The-Amazing-600-Year-History-of-the-Royal-Collection-of-Wild-and-Ferocious-Beasts-Kept-at-the-Tower-of-London-by-Daniel-Hahn.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a04a06a05a02a02/Versailles-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a09a04a08a00a04/The-Story-Of-England-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a05a00a00a07a07/Edward-VII-The-Last-Victorian-King-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a05a00a00a09a09/Napoleon-His-Wives-and-Women-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a03a06a04a07a00/Queen-Victoria-A-Personal-History-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a02a06a00a01a09/Mussolini-The-Rise-and-Fall-of-Il-Duce-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a05a00a01a00a00/Charles-I-A-Life-of-Religion-War-and-Treason-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a03a01a04a03a04/The-Virgin-Queen-Elizabeth-I-Genius-of-the-Golden-Age-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a02a08a09a00a08/The-Life-and-African-Exploration-of-David-Livingstone-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a09a00a01a05a02/A-Brief-History-of-the-Borgias-The-Bloodiest-Family-of-the-Italian-Renaissance-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a05a08a04a08a09/The-Dragon-Wakes-China-and-the-West-1793-1911-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a00a07a07a09a09/Africa-Explored-Europeans-on-the-Dark-Continent-1769-1889-by-Christopher-Hibbert.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a06a02a08a09a00/Western-genre-Novels-including-The-Dark-Tower-Ii-The-Drawing-Of-The-Three-The-Dark-Tower-The-Gunslinger-The-Dark-Tower-Iv-Wizard-And-Glass-The-Dark-Tower-Iii-The-Waste-Lands-The-Dark-Tower-V-Wolves-Of-The-Calla-The-Wind-Through-The-Keyhole-by-Hephaestus-Books.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a02a00a04a09a06/The-Tower-of-London-by-S-seki-Natsume.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a03a07a04a06/Beyond-the-Tower-A-History-of-East-London-by-John-Marriott.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a06a08a04a02/The-Ravenmaster-s-Secret-Escape-From-The-Tower-Of-London-by-Elvira-Woodruff.pdfIn PDF document text
    • http://muicuiu.dumb1.com/5a09a07a00a00a04/Tower-of-Babel-by-Christopher-L-Bennett.pdfIn PDF document text
    • http://muicuiu.dumb1.com/3a02a03a00a01a01/Embassy-Emigrants-and-Englishmen-The-Three-Hundred-Year-History-of-a-Russian-Orthodox-Church-in-London-by-Christopher-Birchall.pdfIn PDF document text

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