Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f3045338b5d0b5a…

MALICIOUS

PDF

18.6 KB Created: 2020-03-20 12:05:45 +00:00 Authoring application: mPDF 5.7
MD5: f72d0cebb90ec62ee00893cf509c2a56 SHA-1: 19bfdab01db8bd4461c5c59f419f38914ca36680 SHA-256: 4f3045338b5d0b5ac0eef50de98dcd2fec0700a47ad985ee1602a455c984469e
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to external PDF documents, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used for SEO spam or to redirect users to malicious content, and the document body itself is heavily obfuscated, preventing a clear understanding of its direct purpose beyond linking to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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.Malware.Agent-9909939-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-9909939-0
  • 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/4559551554558554/Call-of-the-Prairie-Pioneer-Promises-2-by-Vickie-McDonough.pdf
    • http://ieuicufioao.myhome.cx/4559551551555550/Song-of-the-Prairie-Pioneer-Promises-3-by-Vickie-McDonough.pdf
    • http://ieuicufioao.myhome.cx/2550554552552/Whispers-on-the-Prairie-Pioneer-Promises-1-by-Vickie-McDonough.pdf
    • http://ieuicufioao.myhome.cx/2553555550551558/Finally-a-Bride-Texas-Boardinghouse-Brides-3-by-Vickie-McDonough.pdf
    • http://ieuicufioao.myhome.cx/5550553553552550/A-Blue-and-Gray-Christmas-Christmas-Keeps-Love-and-Hope-Alive-During-War-by-Vickie-McDonough.pdf
    • http://ieuicufioao.myhome.cx/4558558559557552/The-Rancher-The-Rancher-Series-3-by-Dawn-Nelson.pdf
    • http://ieuicufioao.myhome.cx/8556553551552/Novels-by-Chris-D-lacey-The-Fire-Eternal-Fire-Star-the-Fire-Within-Icefire-the-Last-Dragon-Chronicles-Fire-World-by-Books-LLC.pdf
    • http://ieuicufioao.myhome.cx/4557554556552/The-Last-Dragon-Chronicles-Complete-Set-Books-1-5-The-Fire-Within-Icefire-Fire-Star-The-Fire-Eternal-and-Dark-Fire-5-Book-Set-by-Chris-d-39-Lacey.pdf
    • http://ieuicufioao.myhome.cx/3558553555555556/PLATOON-LEADER-by-James-R-McDonough.pdf
    • http://ieuicufioao.myhome.cx/9556559559551/The-Preparations-The-Legacy-series-1-by-Danielle-N-McDonough.pdf
    • http://ieuicufioao.myhome.cx/8554552555553551/Coffee-with-Marilyn-by-Yona-Zeldis-McDonough.pdf
    • http://ieuicufioao.myhome.cx/3556556559557556/Deadline-The-Bayou-Secrets-Saga-1-by-Judy-McDonough.pdf
    • http://ieuicufioao.myhome.cx/5550559555553556/The-Doll-with-the-Yellow-Star-by-Yona-Zeldis-McDonough.pdf
    • http://ieuicufioao.myhome.cx/5551550559557551/Stones-River---Bloody-Winter-In-Tennessee-by-James-Lee-McDonough.pdf
    • http://ieuicufioao.myhome.cx/1552552556558/The-Last-Honorable-Man-by-Vickie-Taylor.pdf
    • http://ieuicufioao.myhome.cx/7556553551556551/Kaleidoscope-by-Vickie-Johnstone.pdf
    • http://ieuicufioao.myhome.cx/3555559559554558/I-Dream-of-Zombies-by-Vickie-Johnstone.pdf
    • http://ieuicufioao.myhome.cx/8559552551558556/Path-of-the-Jaguar-by-Vickie-Britton.pdf
    • http://ieuicufioao.myhome.cx/1551558558558558555/Caught-in-the-Act-A-Courageous-Family-s-Fight-to-Save-Their-Daughter-from-a-Serial-Killer-by-Jeannie-McDonough.pdf
    • http://ieuicufioao.myhome.cx/4558553550551558/The-Rancher-by-Kate-Pearce.pdf
    • http://ieuicufioao.myhome.cx/8556

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