Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddad730b0b476ee6…

MALICIOUS

PDF

13.9 KB Created: 2020-03-18 22:23:58 +00:00 Authoring application: mPDF 5.7
MD5: fa59dff61e1ff57cba1c3e5ec46f90c4 SHA-1: 01df3a5261f69d6e2edafb3ffb9ec8bc6255451a SHA-256: ddad730b0b476ee60c12a5e211407fcd40cc05d182cf1f2783e7d95862fedfda
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs pointing to a single domain, identified by the PDF_SEO_LINK_FARM heuristic. This indicates the file is designed to act as a link farm, likely to distribute malicious content or facilitate SEO abuse. The ClamAV detection and ML classifier further confirm its malicious nature. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9798

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.
  • ClamAV: Pdf.Dropper.Agent-7708847-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7708847-0
  • 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://ieuicufioao.myhome.cx/9550558556558559/By-Nightfall-Nightfall-Series-Book-1-by-Ellen-Waite.pdf
    • http://ieuicufioao.myhome.cx/9550558557550551/The-Dark-Side-of-Nightfall-Book-One-Tales-From-Nightfall-Trilogy-by-Tim-O-39-Rourke.pdf
    • http://ieuicufioao.myhome.cx/1556551558558558/Court-of-Nightfall-The-Nightfall-Chronicles-1-by-Karpov-Kinrade.pdf
    • http://ieuicufioao.myhome.cx/1553550556559552/The-Legend-of-Nightfall-Nightfall-1-by-Mickey-Zucker-Reichert.pdf
    • http://ieuicufioao.myhome.cx/9550558556559552/Nightfall-Heart-of-the-Alpha-Book-1-by-Evelyn-Glass.pdf
    • http://ieuicufioao.myhome.cx/1556551559557551/Nightfall-Book-One-of-the-Nightsong-Space-Opera-by-Maximillian-d-39-Erembourg.pdf
    • http://ieuicufioao.myhome.cx/9550558555558559/Nightfall-by-T-K-Lawyer.pdf
    • http://ieuicufioao.myhome.cx/1557551559555/Come-Nightfall-by-Gary-Amo.pdf
    • http://ieuicufioao.myhome.cx/3551555554557557/Nightfall-by-Laura-Griffin.pdf
    • http://ieuicufioao.myhome.cx/9550558557550552/Nightfall-by-Peter-Fehervari.pdf
    • http://ieuicufioao.myhome.cx/3554554557554554/Nightfall-by-Laura-Griffin.pdf
    • http://ieuicufioao.myhome.cx/9550558556558555/Nightfall-by-Dorothy-Daniels.pdf
    • http://ieuicufioao.myhome.cx/1558551559550554/Nightfall-by-Lois-H-Gresh.pdf
    • http://ieuicufioao.myhome.cx/9550558557556553/24-Nightfall-by-Mark-L-Haynes.pdf
    • http://ieuicufioao.myhome.cx/9550558557557556/Nightfall-by-Scott-O-Brown.pdf
    • http://ieuicufioao.myhome.cx/3552558551550554/Nightfall-Two-by-Isaac-Asimov.pdf
    • http://ieuicufioao.myhome.cx/3555557557555557/Nightfall-by-Brian-White.pdf
    • http://ieuicufioao.myhome.cx/9550558556559551/Nightfall-in-Mogadishu-by-Veronica-Li.pdf
    • http://ieuicufioao.myhome.cx/1553552550559559/Nightfall-by-Norah-Wilson.pdf
    • http://ieuicufioao.myhome.cx/9550558557557554/A-lamp-for-nightfall-by-Erskine-Caldwell.pdf
    • http://ieuicufioao.myhome.cx/1558551559550554/Nightfall-by-Lois-H-Gres

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