Malicious PDF — malware analysis report

Static analysis result for SHA-256 91e79ea43b5f18ef…

MALICIOUS

PDF

17.6 KB Created: 2019-05-02 07:30:38 +01:00 Authoring application: mPDF 5.7
MD5: eab2c24f350bef1454c826b13f971bee SHA-1: a6f67fd3485ffa56b6e53b103b0483425dc0abc9 SHA-256: 91e79ea43b5f18ef7feb80f610b03b3e36a9fa8b05cca873722b113392cf7c04
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier strongly indicated maliciousness. While the document body is obfuscated, the presence of numerous links from the domain 'cefasfese.4pu.com' suggests a link farm or redirection strategy. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9807

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/7735734731730/For-the-Fighting-Spirit-of-the-Walnut-by-Takashi-Hiraide.pdf
    • http://cefasfese.4pu.com/1730730738734733731/Successful-Guest-Posting-How-to-Create-Guest-Posts-that-Drive-Traffic-and-Build-Authority-by-Tom-Ewer.pdf
    • http://cefasfese.4pu.com/1733738733730731/The-Bells-of-Nagasaki-by-Takashi-Nagai.pdf
    • http://cefasfese.4pu.com/1731738733731736730/Falling-Into-Love-by-Takashi-Kanzaki.pdf
    • http://cefasfese.4pu.com/1731738733731736735/Heavenly-Body-Yaoi-by-Takashi-Kanzaki.pdf
    • http://cefasfese.4pu.com/4738735730738739/The-Square-Persimmon-and-Other-Stories-by-Takashi-Atoda.pdf
    • http://cefasfese.4pu.com/3731735737734730/Yakitate-Japan-Volume-1-by-Takashi-Hashiguchi.pdf
    • http://cefasfese.4pu.com/5735736736737735/Art-Tea-and-Industry-Masuda-Takashi-and-the-Mitsui-Circle-by-Christine-M-E-Guth.pdf
    • http://cefasfese.4pu.com/1731738733734738735/-Kichi-no-Oshigoto-Working-at-the-Base-by-Takashi-Kanzaki.pdf
    • http://cefasfese.4pu.com/7732732731738730/D-t-sh-M-ketingu-Iyakuhin-To-Iry-Sh-hisha-No-Atarashii-Komyunik-shon-by-Takashi-Furukawa.pdf
    • http://cefasfese.4pu.com/5733733736730737/The-Making-of-the-Rape-of-Nanking-History-and-Memory-in-Japan-China-and-the-United-States-by-Takashi-Yoshida.pdf
    • http://cefasfese.4pu.com/4733733731739733/A-Song-for-Nagasaki-The-Story-of-Takashi-Nagai-Scientist-Convert-and-Survivor-of-the-Atomic-Bomb-by-Paul-Glynn.pdf
    • http://cefasfese.4pu.com/3733732732737735/The-Guest-by-Lord-Dunsany.pdf
    • http://cefasfese.4pu.com/4733738730731736/The-Guest-by-Albert-Camus.pdf
    • http://cefasfese.4pu.com/8734736735739/The-7th-Guest-by-Matthew-J-Costello.pdf
    • http://cefasfese.4pu.com/7730732739735739/Jessie-Mei-Mei-by-Sharon-Guest.pdf
    • http://cefasfese.4pu.com/1739737731735730/Be-My-Guest-and-Pay-Me-by-Pamela-Demorest.pdf
    • http://cefasfese.4pu.com/6733734734731730/Adeline-Genee-by-I-or-Guest.pdf
    • http://cefasfese.4pu.com/4738734730734732/Hat-Trick-by-Jacqueline-Guest.pdf
    • http://cefasfese.4pu.com/8732731736739734/Talindor-s-Guest-by-Charles-McGarry.pdf

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