Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4bd8928626a90b…

MALICIOUS

PDF

17.3 KB Created: 2020-02-15 01:40:09 +00:00 Authoring application: mPDF 5.7
MD5: f559e89fc66f23bb2d2f5109f4a942b5 SHA-1: 22eee5bb63473cea515efef699dd9ab5f4bab737 SHA-256: 9a4bd8928626a90b8ae344dc63dcf013c7923734e3ad3df90931a796ac2843ae
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, which suggests a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious with high confidence. The primary attack pattern appears to be the distribution of numerous external links, likely to manipulate search engine results or redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://tuiwckiko.jpn.ph/95d75d95d55d85d8/The-Emperor-s-New-Clothes-English-Japanese-version-KiiroitoriBooks-Book-9-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/65d65d85d55d65d2/The-Selfish-Giant-English-Japanese-versions-KiiroitoriBooks-Book-22-by-Oscar-Wilde.pdf
    • http://tuiwckiko.jpn.ph/15d85d45d35d45d2/The-Complete-Hans-Christian-Andersen-Fairy-Tales-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/35d25d85d15d15d2/Hans-Andersen-s-Fairy-Tales-Retold-by-Naomi-Lewis-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/15d05d35d75d05d35d8/The-Snow-Queen-Christmas-Stories-Book-3-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/85d15d35d75d55d1/H-C-Andersen-s-Sammtliche-Marchen-1876-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/65d75d95d05d45d9/Andersen-s-Fairy-Tales-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/25d35d75d35d35d9/The-Nightingale-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/15d15d75d15d35d35d9/La-sirenetta-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/35d05d45d95d05d7/The-Two-Baronesses-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/15d05d85d55d15d15d7/The-Ugly-Duckling-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/45d65d55d75d25d7/The-Snow-Queen-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/55d55d15d35d35d8/The-Little-Mermaid-and-Other-Tales-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/85d45d55d25d95d1/The-little-match-girl-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/25d55d75d75d15d6/The-Wild-Swans-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/55d75d75d45d05d8/The-Complete-Fairy-Tales-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/35d45d35d25d35d4/The-Snow-Queen-A-Tale-in-Seven-Stories-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/15d55d15d35d25d7/Journey-in-Blue-A-Novel-About-Hans-Christian-Andersen-by-Stig-Dalager.pdf
    • http://tuiwckiko.jpn.ph/85d65d85d35d55d0/Die-Schneek-nigin-Ein-M-rchen-in-Sieben-Geschichten-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/15d15d35d15d45d15d5/M-rchenbuch-Die-sch-nsten-M-rchen-f-r-Kinder-und-Erwachsene---illustrierte-Ausgabe-by-Hans-Christian-Andersen.pdf
    • http://tuiwckiko.jpn.ph/15d15d75d15d35d35d

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