Malicious PDF — malware analysis report

Static analysis result for SHA-256 39df044774d05d81…

MALICIOUS

PDF

13.5 KB Created: 2019-05-02 00:16:22 +01:00 Authoring application: mPDF 5.7
MD5: b3669d9a6bb70b87bc2520ea77d991f9 SHA-1: 4d927ca78cfc3258f725606651fc334379f4f122 SHA-256: 39df044774d05d8179a0a07e4ada273e64d1fcca94779acf0a4319ab5bb7fbce
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, suggesting a link farm or redirection tactic. While the ML classifier also flagged it as malicious, no scripts were extracted, and the majority of the URLs were labeled as confirmed benign. The primary attack pattern appears to be the distribution of numerous links, likely to manipulate search engine results or to serve as a lure for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9102

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://loaminoo.linkpc.net/1096091098090090/Titanic-Survivor-The-Newly-Discovered-Memoirs-of-Violet-Jessop-Who-Survived-Both-the-Titanic-and-Britannic-Disasters-by-Violet-Jessop.pdf
    • http://loaminoo.linkpc.net/2099096092094093/Church-of-Lies-by-Flora-Jessop.pdf
    • http://loaminoo.linkpc.net/9096090090093095/The-Candy-Floss-Head-by-Bev-Jessop.pdf
    • http://loaminoo.linkpc.net/1090097098093097/The-Escape-Escape-1-by-Lindsay-Luterman.pdf
    • http://loaminoo.linkpc.net/1091092092091091098/Poetry-in-Motion-The-Lyrics-and-Poems-of-Carolyn-Luger-Vermes-by-Carolyn-Vermes.pdf
    • http://loaminoo.linkpc.net/2094099093091093/Getting-Lei-d-Escape-1-by-Ann-Omasta.pdf
    • http://loaminoo.linkpc.net/2091093099097098/The-Escape-by-NOT-A-BOOK.pdf
    • http://loaminoo.linkpc.net/2091091097096094/Escape-by-C-Shell.pdf
    • http://loaminoo.linkpc.net/9095097099096/Escape-down-under-Down-under-1-by-S-M-Phillips.pdf
    • http://loaminoo.linkpc.net/2097099096094093/Escape-by-P-J-Adams.pdf
    • http://loaminoo.linkpc.net/1099092098093095/The-Escape-by-Kol-Anderson.pdf
    • http://loaminoo.linkpc.net/5090093094098090/Escape-from-Sonora-by-Will-Bryant.pdf
    • http://loaminoo.linkpc.net/4098096098098090/Hitler-s-Escape-by-Ron-Hansig.pdf
    • http://loaminoo.linkpc.net/3099092096098096/The-Narrative-Escape-by-Tom-Stafford.pdf
    • http://loaminoo.linkpc.net/2092091093099097/Escape-by-Barbara-Delinsky.pdf
    • http://loaminoo.linkpc.net/1094095094093090/The-Escape-by-Adam-Thirlwell.pdf
    • http://loaminoo.linkpc.net/6096099092099091/Escape-by-Georgia-Bruton.pdf
    • http://loaminoo.linkpc.net/3095092091099099/Snowpiercer-Vol-1-The-Escape-by-Jacques-Lob.pdf
    • http://loaminoo.linkpc.net/1096093090095090/Escape-Velocity-by-Ron-S-Friedman.pdf
    • http://loaminoo.linkpc.net/1090095098096096090/Escape-to-Proxima-by-Tye-Ellinwood.pdf
    • http://loaminoo.linkpc.net/10990920980930

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