Malicious PDF — malware analysis report

Static analysis result for SHA-256 da49de5c33d39ec4…

MALICIOUS

PDF

28.7 KB Created: 2019-05-01 05:24:50 +01:00 Authoring application: mPDF 5.7
MD5: ecd01795186055e84cb8b66fe12199fb SHA-1: 43c5b3890221270324d7644ab0d1e315be0d7d95 SHA-256: da49de5c33d39ec445cd8ab37d0098365fc2e3415a461a9f1fc82028ed688a1e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links pointing to external PDF documents hosted on the domain 'cefasfese.4pu.com'. This heuristic firing, combined with the ML classifier's high confidence, indicates a malicious intent. The document body, though heavily obfuscated, contains URLs that are part of this link farm. The primary attack pattern appears to be a link farm designed to manipulate search engines or distribute further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9695

Heuristics 2

  • 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.
  • 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://cefasfese.4pu.com/5736735733734739/I-Should-Be-Writing-A-Writer-s-Workshop-by-Mur-Lafferty.pdf
    • http://cefasfese.4pu.com/7739735738733731/Writing-Mastery-How-to-Master-the-Art-of-Writing-amp-Write-3-000-Words-Per-Day---Overcoming-Writer-s-Block-Make-Money-Online-Copywriting-Erotica-Writing-Writing-Mastery-How-to-Write-a-Book-by-Lance-Devoir.pdf
    • http://cefasfese.4pu.com/3734733730733735/Welcome-to-the-Writer-s-Life-How-to-Design-Your-Writing-Craft-Writing-Business-Writing-Practice-and-Reading-Practice-by-Paulette-Perhach.pdf
    • http://cefasfese.4pu.com/2737734738735730/Gotham-Writers-Workshop-Writing-Fiction-The-Practical-Guide-From-New-York-s-Acclaimed-Creative-Writing-School-by-Alexander-Steele.pdf
    • http://cefasfese.4pu.com/7738730731734731/The-Modern-Library-Writer-s-Workshop-A-Guide-to-the-Craft-of-Fiction-by-Stephen-Koch.pdf
    • http://cefasfese.4pu.com/1731730738733738735/Business-Writing-One-Hour-Workshop-by-Carol-Silvis.pdf
    • http://cefasfese.4pu.com/3739731734735735/Writing-Your-Memoirs-Workshop-A-Manual-for-Instructors-by-Karen-Silvestri.pdf
    • http://cefasfese.4pu.com/7737737736739733/Journaling-from-the-Heart-A-Writing-Workshop-in-Three-Parts-by-Eldonna-Bouton.pdf
    • http://cefasfese.4pu.com/3739739737734/Writing-Down-the-Bones-Freeing-the-Writer-Within-by-Natalie-Goldberg.pdf
    • http://cefasfese.4pu.com/8730738737739734/Scientific-Writing-A-Reader-and-Writer-s-Guide-by-Jean-Luc-Lebrun.pdf
    • http://cefasfese.4pu.com/1730736731739730737/Just-Writing-Grammar-Punctuation-and-Style-for-the-Legal-Writer-by-Anne-Enquist.pdf
    • http://cefasfese.4pu.com/4733733730738732/The-Complete-Handbook-Of-Novel-Writing-Everything-You-Need-To-Know-About-Creating-amp-Selling-Your-Work-by-Writer-39-s-Digest-Books.pdf
    • http://cefasfese.4pu.com/5733736730734/The-Writer-in-the-Writing-Author-as-Hero-in-Postwar-American-Fiction-by-Krzysztof-Andrzejczak.pdf
    • http://cefasfese.4pu.com/7739733733737730/Writing-Is-My-Drink-A-Writer-s-Story-of-Finding-Her-Voice-by-Theo-Pauline-Nestor.pdf
    • http://cefasfese.4pu.com/2737734732732736/Writing-Habit-Mastery---How-to-Write-2-000-Words-a-Day-and-Forever-Cure-Writer-s-Block-by-S-J-Scott.pdf
    • http://cefasfese.4pu.com/3735738739732738/Dear-Mister-Essay-Writer-Guy-Advice-and-Confessions-on-Writing-Love-and-Cannibals-by-Dinty-W-Moore.pdf
    • http://cefasfese.4pu.com/2737734736739731/A-Writer-s-Book-of-Days-A-Spirited-Companion-and-Lively-Muse-for-the-Writing-Life-by-Judy-Reeves.pdf
    • http://cefasfese.4pu.com/2737735732737730/Writing-Vivid-Dialogue-Professional-Techniques-for-Fiction-Authors-Writer-s-Craft-Book-16-by-Rayne-Hall.pdf
    • http://cefasfese.4pu.com/1731734738736732737/The-Journal-Writer-s-Guide-to-Staying-Started-A-Companion-Workbook-to-the-Getting-Started-Staying-Started-Journaling-Workshop-by-Nathan-Ohren.pdf
    • http://cefasfese.4pu.com/2737735739738734/Aliens-amp-Alien-Societies-A-Writer-s-Guide-to-Creating-Extraterrestrial-Life-Forms-Science-Fiction-Writing-Series-by-Stanley-Schmidt.pdf
    • http://cefasfese.4pu.com/2737734738735730/Gotham-Writers-Workshop-Writing-Fiction-The-Practical-Guide-From-New-York-s-Acc

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