Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af26b3a27432edc…

MALICIOUS

PDF

23.0 KB Created: 2019-04-30 04:21:04 +01:00 Authoring application: mPDF 5.7 First seen: 2021-07-10
MD5: 70791972a7e84111215af82dcba788db SHA-1: e224a5b0c322fd59438c4b35abfc3c16388d9ce4 SHA-256: 2af26b3a27432edc991575e14a4b418e18aa02157ccd55f4bdba25f0d3e17f3a
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a malicious intent to manipulate search engine results or redirect users to potentially harmful content. While the document body is heavily corrupted, the presence of numerous URLs and the ML classifier's high confidence score indicate a malicious document. The SE_DOWNLOAD_BUTTON heuristic further suggests a lure to encourage user interaction with these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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/1a01a09a00a07a08a02/The-Diabolo-Book-Spinning-a-Top-on-a-String-with-Hand-Sticks-by-Jack-Wiley.pdf In PDF document text
    • http://muicuiu.dumb1.com/1a04a06a03a07a06/Ceiling-of-Sticks-by-Shane-Book.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a05a04a06a03a01/String-of-Fate-Romance-Book-1-by-Juvy-Ann.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a02a09a04a02a05/Chicks-with-Sticks-Knitwise-Chicks-with-Sticks-3-by-Elizabeth-Lenhard.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a05a06a08a07a05/String-Theory-From-Gauge-Interactions-to-Cosmology-Proceedings-of-the-NATO-Advanced-Study-Institute-on-String-Theory-From-Gauge-Interactions-to-Cosmology-Cargese-France-from-7-to-19-June-2004-by-Laurent-Baulieu.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a09a00a09a04a01/View-from-Mount-Diabolo-by-Ralph-Thompson.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a06a07a08a02a07/The-Jack-Lockwood-Diaries-Jack-Lockwood-Mystery-Series-Book-4-by-Geoffrey-David-West.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a09a00a02a06a03/The-Left-Hand-of-Destiny-Book-One-by-J-G-Hertzler.pdfIn PDF document text
    • http://muicuiu.dumb1.com/9a09a00a02a06a08/The-Left-Hand-of-Destiny-Book-Two-by-J-G-Hertzler.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a03a09a06a04a08/Yorien-s-Hand-The-Minstrel-s-Song-Book-3-by-Jenelle-Leanne-Schmidt.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a04a02a03a01a00/Hand-Made-Hand-Played-The-Art-Craft-of-Contemporary-Guitars-by-Robert-Shaw.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a00a01a05a02a06a00/Der-neue-Landdoktor-26---Arztroman-Wir-beide-Hand-in-Hand-by-Tessa-Hofreiter.pdfIn PDF document text
    • http://muicuiu.dumb1.com/7a01a00a02a08a09/The-Thing-in-Hand-Empowerment-Through-Releasing-What-You-Have-in-Hand-Already-by-Terry-Dashner.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a09a07a05a02a04/The-Hand-Of-Iblis-An-Anatomy-Of-Evil-Summary-Observations-On-The-Hidden-Hand-Of-The-New-World-Order-by-Omar-Zaid.pdfIn PDF document text
    • http://muicuiu.dumb1.com/4a07a07a02a09a01/Left-Hand-Right-Hand-An-Autobiography-Vol-1-by-Osbert-Sitwell.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a04a08a07a05a02/Take-My-Hand-Series-Box-Set-Volumes-1-4-Take-My-Hand-1-4-by-Nicola-Haken.pdfIn PDF document text
    • http://muicuiu.dumb1.com/6a00a07a04a09a05/The-Hand-Book-of-Taste-Or-How-to-Observe-Works-of-Art-Especially-Cartoons-Pictures-and-Statues-by-Fabius-Pictor.pdfIn PDF document text
    • http://muicuiu.dumb1.com/8a05a01a03a00/Hand-Hand-Fingers-Thumb-by-Al-Perkins.pdfIn PDF document text
    • http://muicuiu.dumb1.com/1a01a09a00a09a03a04/Mahdollista-Mainontaa-Sisaltavat-Artikkelit-Baari-the-Sims-3-KDE-Hattrick-MTV-Partalan-Kartano-Diabolo-San-Zeno-Maggiore-4h-Jarjesto-by-L-Hde-Wikipedia.pdfIn PDF document text
    • http://muicuiu.dumb1.com/2a01a07a01a08a01/Spinning-by-Michael-Baron.pdfIn PDF document text

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