Malicious PDF — malware analysis report

Static analysis result for SHA-256 e57477783413859a…

MALICIOUS

PDF

21.7 KB Created: 2019-05-02 05:07:06 +01:00 Authoring application: mPDF 5.7
MD5: e7ae6610b9dd94179e861db78be7d0cf SHA-1: 5c4d1bd196e9ccf8a605343e2748d9145a09baea SHA-256: e57477783413859a5d691965295afe61d59f3a65931d698d7480b507ff07822e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF documents, forming a link farm. This heuristic, combined with the ML classifier flagging the document as malicious, suggests the primary intent is to redirect users to potentially harmful content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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/9738732737733738/Rattlesnakes-Zoobooks-by-Beth-Wagner-Brust.pdf
    • http://cefasfese.4pu.com/9738732737734730/Seabirds-Zoobooks-by-Beth-Wagner-Brust.pdf
    • http://cefasfese.4pu.com/8738737733739733/Articles-on-Dragaera-Including-Steven-Brust-Jhereg-Dzur-Teckla-Jhereg-Novel-Yendi-Novel-Athyra-Phoenix-Novel-Taltos-Steven-Brust-Novel-Orca-Novel-Dragon-Steven-Brust-Novel-Issola-Khaavren-Romances-by-Hephaestus-Books.pdf
    • http://cefasfese.4pu.com/7739738737735735/Mozambique-and-the-Great-Flood-of-2000-by-Frances-Christie.pdf
    • http://cefasfese.4pu.com/8739731738734734/Ramp-Rats-A-Tale-of-the-Great-Flood-of-1993-by-Corrine-Alton.pdf
    • http://cefasfese.4pu.com/1738736736731/Wat-kame-s-Journey-The-Story-of-the-Great-Flood-and-the-New-World-by-Hallie-N-Love.pdf
    • http://cefasfese.4pu.com/3734732732737738/Washed-Away-How-the-Great-Flood-of-1913-America-s-Most-Widespread-Natural-Disaster-Terrorized-a-Nation-and-Changed-It-Forever-by-Geoff-Williams.pdf
    • http://cefasfese.4pu.com/3731730732730737/Great-American-Classics-Cookbook-by-Beth-Allen.pdf
    • http://cefasfese.4pu.com/3737734732736/The-Moomins-and-the-Great-Flood-The-Moomins-1-by-Tove-Jansson.pdf
    • http://cefasfese.4pu.com/1736734730733/The-Science-of-Sherlock-Holmes-From-Baskerville-Hall-to-the-Valley-of-Fear-the-Real-Forensics-Behind-the-Great-Detective-s-Greatest-Cases-by-E-J-Wagner.pdf
    • http://cefasfese.4pu.com/4732738739731735/Flood-Flood-1-by-Stephen-Baxter.pdf
    • http://cefasfese.4pu.com/8737737731731736/Der-lachende-Wagner-Das-unbekannte-Leben-des-Bayreuther-Meisters-Richard-Wagner-by-Joachim-K-hler.pdf
    • http://cefasfese.4pu.com/3731731732735736/Walk-on-the-Wild-Side-The-Best-Horror-Stories-of-Karl-Edward-Wagner-Volume-Two-by-Karl-Edward-Wagner.pdf
    • http://cefasfese.4pu.com/3731730733737734/Where-the-Summer-Ends-The-Best-Horror-Stories-of-Karl-Edward-Wagner-Volume-One-by-Karl-Edward-Wagner.pdf
    • http://cefasfese.4pu.com/2738731734737738/The-Gypsy-by-Steven-Brust.pdf
    • http://cefasfese.4pu.com/9738732736734735/The-Desecrator-by-Steven-Brust.pdf
    • http://cefasfese.4pu.com/4736730732731730/Brokedown-Palace-by-Steven-Brust.pdf
    • http://cefasfese.4pu.com/9738732737734737/Teufelchen-in-der-Brust-by-Miriam-K-the.pdf
    • http://cefasfese.4pu.com/2739734735739736/Good-Guys-by-Steven-Brust.pdf
    • http://cefasfese.4pu.com/3734734732734733/To-Reign-In-Hell-by-Steven-Brust.pdf
    • http://cefasfese.4pu.com/3734732732737738/Washed-Away-How-the-Gre

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