Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc1f1e7e394eb28…

MALICIOUS

PDF

14.8 KB Created: 2019-11-09 23:20:41 +00:00 Authoring application: mPDF 5.7
MD5: 01e1c5f97ef57f12bccc81e778ba73e3 SHA-1: 3c0783ec79d7e50f44335be81416a7c69a29d1dd SHA-256: 4cc1f1e7e394eb280789e79677bf11acdebb2d12a5334aa59adf1b83bf81fdad
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO poisoning or to redirect users to malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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/1730733738731738733/Beyond-the-Looking-Glas-by-Natasha-Perova.pdf
    • http://cefasfese.4pu.com/5739736730730737/Natasha-s-Dream-The-Natasha-Saga-1-by-Heath-Greenis.pdf
    • http://cefasfese.4pu.com/5739736730737733/Natasha-of-the-Hadi-Natasha-Carmichael-4-by-Melissa-Leister.pdf
    • http://cefasfese.4pu.com/5739736730737731/Natasha-s-Diary-The-Natasha-Saga-2-by-Heath-Greenis.pdf
    • http://cefasfese.4pu.com/3738732736731733/Glas-by-Jacques-Derrida.pdf
    • http://cefasfese.4pu.com/1730732738736733/Children-of-the-Storm-The-Autobiography-of-Natasha-Vins-by-Natasha-Vins.pdf
    • http://cefasfese.4pu.com/7734736739734739/Lente-Van-Glas-by-Christine-Otten.pdf
    • http://cefasfese.4pu.com/1730733738730738730/Rebirth-Kingdom-of-Glas-1-by-K-Vider.pdf
    • http://cefasfese.4pu.com/3737733733734/Doctor-Glas-by-Hjalmar-S-derberg.pdf
    • http://cefasfese.4pu.com/9735735732733735/Kuchen-im-Glas-50-Trendkuchen-neu-serviert-by-Al-na-nn.pdf
    • http://cefasfese.4pu.com/9730735737736735/So-kalt-wie-Eis-so-klar-wie-Glas-by-Oliver-Schlick.pdf
    • http://cefasfese.4pu.com/7739737739735738/LeBor-Clann-Glas-Volume-I-10-830-Bce-to-365-Ce-by-Lucius-Ferris.pdf
    • http://cefasfese.4pu.com/1730732733737731734/Unter-Glas-Drei-Jahre-in-der-Angst-H-lle-by-Britta-Precht.pdf
    • http://cefasfese.4pu.com/1731736731732734731/Vorgange-in-Der-Grenzschicht-Zwischen-Feuerfestem-Material-Und-Glas-Bzw-Schlacke-by-Kamillo-Konopicky.pdf
    • http://cefasfese.4pu.com/3730731739734733/For-Keeps-by-Natasha-Friend.pdf
    • http://cefasfese.4pu.com/3737732732736730/How-We-Roll-by-Natasha-Friend.pdf
    • http://cefasfese.4pu.com/1731731730736736/Lush-by-Natasha-Friend.pdf
    • http://cefasfese.4pu.com/5738733736731734/The-Masquers-by-Natasha-Peters.pdf
    • http://cefasfese.4pu.com/3730731730739738/Alpha-by-Natasha-Knight.pdf
    • http://cefasfese.4pu.com/1730738732730730/The-Elites-by-Natasha-Ngan.pdf
    • http://cefasfese.4pu.com/1731736731732734731/Vorgange-in-Der-Grenzschicht-Zwischen-Feue

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