Malicious PDF — malware analysis report

Static analysis result for SHA-256 c362e09ead13b4a2…

MALICIOUS

PDF

21.5 KB Created: 2019-05-02 05:17:26 +01:00 Authoring application: mPDF 5.7 First seen: 2021-06-28
MD5: e579b3bea37543bfe9dbf39cb42eb524 SHA-1: 0f89d407b199325f206c6277207980969248ae37 SHA-256: c362e09ead13b4a21400191c5b586fcf52ac964b19805d5eb8e78fb588003d2f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to a single domain, identified by the PDF_SEO_LINK_FARM heuristic. While the ML classifier flagged the PDF as malicious, the embedded URLs themselves were labeled as confirmed benign. The document body is heavily obfuscated and unreadable, but the presence of numerous links suggests an attempt to manipulate search engine results or redirect users to potentially malicious content hosted on the `cefasfese.4pu.com` domain. No scripts were extracted from this sample.

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/8737735737736733/Heritage-Memory-amp-Identity-by-Helmut-K-Anheier.pdf In PDF document text
    • http://cefasfese.4pu.com/8737735737736736/Cultures-and-Globalization-Cultural-Expression-Creativity-and-Innovation-The-Cultures-and-Globalization-Series-by-Helmut-K-Anheier.pdfIn PDF document text
    • http://cefasfese.4pu.com/1730733738735732734/Memory-s-Fragile-Power-Crises-of-Memory-Identity-and-Narrative-in-the-Contemporary-English-Novel-by-Dorothee-Birke.pdfIn PDF document text
    • http://cefasfese.4pu.com/5733738739731/Memory-And-Identity-Personal-Reflections-by-John-Paul-II.pdfIn PDF document text
    • http://cefasfese.4pu.com/7738732730734736/Memory-and-Identity-in-the-Narratives-of-Soledad-Puertolas-by-Tamara-L-Townsend.pdfIn PDF document text
    • http://cefasfese.4pu.com/1730735732730739733/Memory-and-Identity-Conversations-at-the-Dawn-of-a-Millennium-by-John-Paul-II.pdfIn PDF document text
    • http://cefasfese.4pu.com/3732735737739/Jim-Crow-Wisdom-Memory-and-Identity-in-Black-America-Since-1940-by-Jonathan-Scott-Holloway.pdfIn PDF document text
    • http://cefasfese.4pu.com/1731730733734735739/Ostzeit-Westzeit-Aufbruche-Einer-Neuen-Kultur-Helmut-Bottiger-by-Helmut-Bottiger.pdfIn PDF document text
    • http://cefasfese.4pu.com/9734737730737739/The-War-Diary-of-Hauptmann-Helmut-Lipfert-JG-52-on-the-Russian-Front-1943-45-by-Helmut-Lipfert.pdfIn PDF document text
    • http://cefasfese.4pu.com/5736738732737732/L-H-ritage-Tome-4-L-H-ritage-by-Christopher-Paolini.pdfIn PDF document text
    • http://cefasfese.4pu.com/5737739735734732/Mon-H-ritage-Ma-Culture-Mes-Souvenirs-1898-1998-My-Heritage-My-Culture-My-Memories-by-Caroline-Roy-Laprise.pdfIn PDF document text
    • http://cefasfese.4pu.com/1730734734733730731/Helmut-Newton-Pola-Woman-by-Helmut-Newton.pdfIn PDF document text
    • http://cefasfese.4pu.com/9730730737736737/Discovering-Her-Wolfen-Heritage-A-Wolfen-Heritage-1-by-Missy-Martine.pdfIn PDF document text
    • http://cefasfese.4pu.com/9730730737736738/Denying-His-Wolfen-Heritage-A-Wolfen-Heritage-2-by-Missy-Martine.pdfIn PDF document text
    • http://cefasfese.4pu.com/5738732734732731/France-s-World-Heritage-Sites-Travel-Guide-Best-World-Heritage-Sites---2017-by-J-r-me-Sabatier.pdfIn PDF document text
    • http://cefasfese.4pu.com/6733731735734730/You-Can-Have-an-Amazing-Memory-Learn-Life-Changing-Techniques-and-Tips-from-the-Memory-Maestro-by-Dominic-O-39-Brien.pdfIn PDF document text
    • http://cefasfese.4pu.com/1730734734732733735/Helmut-Newton-Portraits-by-Helmut-Newton.pdfIn PDF document text
    • http://cefasfese.4pu.com/3737737734736739/A-Memory-Of-Light-Wheel-of-Time-14-A-Memory-of-Light-3-by-Robert-Jordan.pdfIn PDF document text
    • http://cefasfese.4pu.com/4731731733738732/Blood-Memory-Beneath-the-Surface-Blood-Memory-2-by-Rosalind-Hartmann.pdfIn PDF document text
    • http://cefasfese.4pu.com/2738735735735739/Memory-s-Wake-Memory-s-Wake-Trilogy-1-by-Selina-Fenech.pdfIn PDF document text

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