Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f392ac6e741a4e5…

MALICIOUS

PDF

12.8 KB Created: 2020-03-18 22:07:33 +00:00 Authoring application: mPDF 5.7 First seen: 2021-08-20
MD5: d51151f1bdd99f1e87ae0043f062e2d6 SHA-1: 281659d1bb4622ec5d0609fe7b3f36633a4d2509 SHA-256: 5f392ac6e741a4e54b4360f5d7b749323cc058240591da2c1cd67ec1c5e718f5
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF documents. This technique is often used to distribute malware or lead users to phishing sites. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was truncated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9006

Heuristics 3

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ujcsiniio.myhome.cx/1cd0cd1cd7cd1cd5cd4/The-Good-Earth-Trilogy-The-Good-Earth-Sons-and-A-House-Divided-by-Pearl-S-Buck.pdf In PDF document text
    • http://ujcsiniio.myhome.cx/6cd5cd1cd7cd9/The-Good-Earth-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/9cd5cd9cd2cd3cd7/The-Good-Earth-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/3cd4cd2cd9cd1cd4/The-Good-Earth-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/4cd8cd3cd8cd3cd4/The-Good-Earth-House-of-Earth-1-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/8cd0cd9cd0cd6cd3/Kinfolk-A-Novel-of-China-Oriental-Novels-of-Pearl-S-Buck-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/1cd3cd7cd0cd2cd4/A-House-Divided-House-of-Earth-3-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/6cd4cd2cd2cd4cd7/Sons-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/3cd4cd0cd2cd4cd8/Mandala-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/1cd4cd9cd3cd1cd6/Peony-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/7cd1cd6cd8cd8/The-Eternal-Wonder-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/5cd9cd1cd6cd6/The-Hidden-Flower-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/9cd5cd9cd9cd2/Dragon-Seed-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/7cd7cd5cd3cd6cd9/Portrait-of-a-Marriage-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/2cd1cd7cd5cd0/Pearl-S-Buck-A-Cultural-Biography-by-Peter-Conn.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/4cd9cd6cd9cd7/East-Wind-West-Wind-by-Pearl-S-Buck.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/6cd8cd6cd6cd5cd8/Pearl-and-Wagner-Two-Good-Friends-by-Kate-McMullan.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/1cd0cd1cd6cd9cd8cd5/Buck-Em-The-Autobiography-of-Buck-Owens-by-Randy-Poe.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/1cd0cd1cd7cd2cd1cd0/Buck-Buck-the-Chicken-by-Amy-Ehrlich.pdfIn PDF document text
    • http://ujcsiniio.myhome.cx/3cd1cd0cd3cd3cd0/Belle-Pearl-Pearl-5-by-Arianne-Richmonde.pdfIn PDF document text

Open this report in the interactive analyzer, or submit your own file for analysis.