Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb9239c00eca53d0…

MALICIOUS

PDF

17.6 KB Created: 2019-05-02 07:30:33 +01:00 Authoring application: mPDF 5.7
MD5: 6ed0dff33d8d14f362c58933d53431bc SHA-1: e30be6150425e9f9a4302b24f57c7981c09ac5c4 SHA-256: cb9239c00eca53d042a06d7321cba816593c1e023164280c7d3c800a2c4a7d2a
60 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF document contains a large number of embedded links, identified by the PDF_SEO_LINK_FARM heuristic. These links predominantly point to the domain 'cefasfese.4pu.com' and appear to be designed to direct users to external PDF files. No scripts were extracted from this sample. The primary attack pattern observed is the distribution of numerous external links, likely as a form of SEO poisoning or a link farm to drive traffic or potentially host malicious content disguised as legitimate documents.

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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