Malicious PDF — malware analysis report

Static analysis result for SHA-256 882a3f04f76c8b84…

MALICIOUS

PDF

18.5 KB Created: 2019-05-02 17:41:50 +01:00 Authoring application: mPDF 5.7
MD5: dcd8b3d43e5c76b8a67291e60dc2772a SHA-1: 908c2eafffbafe7f9377f431c0af678d5eda497e SHA-256: 882a3f04f76c8b84bd5f2a449f4aaf2170a55507fdd8faaef54327b26042c6a0
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded links to external PDF documents, all hosted on the same domain. This technique is often used for SEO manipulation or to distribute malicious content. While no scripts were extracted, the ML classifier strongly indicated maliciousness, and the PDF structure itself is suspicious. The primary IOC is the dominant host 'cefasfese.4pu.com' which hosts the linked documents.

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/1736731732739739/The-Nobleman-and-the-Spy-by-Bonnie-Dee.pdf
    • http://cefasfese.4pu.com/1731738730736730737/The-Rise-Of-The-House-Of-Rothschild-by-Egon-Caesar-Conte-Corti.pdf
    • http://cefasfese.4pu.com/3738732733732731/An-Uncertain-Destiny-by-Jannine-Gallant.pdf
    • http://cefasfese.4pu.com/3738739737734731/Road-To-Serendipity-by-Jannine-Gallant.pdf
    • http://cefasfese.4pu.com/3735739730738734/The-Adventure-of-the-Italian-Nobleman-A-Short-Story-by-Agatha-Christie.pdf
    • http://cefasfese.4pu.com/9738733737739733/Man-muss-auf-dem-Grund-gewesen-sein-Aufgezeichnet-von-Jacqueline-Kornm-ller-by-Cecily-Corti.pdf
    • http://cefasfese.4pu.com/4739738738731738/Every-Move-She-Makes-Who-s-Watching-Now-1-by-Jannine-Gallant.pdf
    • http://cefasfese.4pu.com/2739733736733738/Every-Move-She-Makes-Who-s-Watching-Now-1-by-Jannine-Gallant.pdf
    • http://cefasfese.4pu.com/1730730735733738734/So-en-ohne-T-te-mit-dem-Thermomix-by-Jannine-Bauer.pdf
    • http://cefasfese.4pu.com/6731731736734734/Da-Aztlan-All-amerindia-Multiculturalismo-E-Difesa-Dell-identita-Chicana-Nella-Poesia-Di-Alurista-by-Erminio-Corti.pdf
    • http://cefasfese.4pu.com/1734737730731737/The-Bloody-White-Baron-The-Extraordinary-Story-of-the-Russian-Nobleman-Who-Became-the-Last-Khan-of-Mongolia-by-James-Palmer.pdf
    • http://cefasfese.4pu.com/4739735732737730/The-Bloody-White-Baron-The-Extraordinary-Story-of-the-Russian-Nobleman-Who-Became-the-Last-Khan-of-Mongolia-by-James-Palmer.pdf
    • http://cefasfese.4pu.com/6734731732737735/Always-Been-Mine-The-Bastards-MC-1-by-Carina-Adams.pdf
    • http://cefasfese.4pu.com/1731730733739736737/Soundtracks-of-a-Life-by-Carina-Lupo.pdf
    • http://cefasfese.4pu.com/4736731738736739/Model-Undercover-London-by-Carina-Axelsson.pdf
    • http://cefasfese.4pu.com/6734731734733734/Claiming-Carina-Dragon-Warriors-3-by-Khloe-Wren.pdf
    • http://cefasfese.4pu.com/7738733733733734/X-Rated---Mom-And-Son-Pseudo-Incest-Taboos-by-Carina-Marsh.pdf
    • http://cefasfese.4pu.com/1730737736731735738/Kirschroter-Sommer-Reihe-in-2-B-nden-by-Carina-Bartsch.pdf
    • http://cefasfese.4pu.com/1731735739736735732/Eva-und-Marta-Eine-heisse-Sommernacht-by-Carina-Madux.pdf
    • http://cefasfese.4pu.com/6734731734733738/Winning-The-Alpha-Wolf-Rock-Shifters-1-by-Carina-Wilder.pdf
    • http://cefasfese.4pu.com/17

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