Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1b31006776236cc…

MALICIOUS

PDF

18.1 KB Created: 2019-05-04 10:19:47 +01:00 Authoring application: mPDF 5.7
MD5: 57c014956296934d30b98c4955ef056b SHA-1: 2540e528edd37448670feb1eece16d668e74daac SHA-256: b1b31006776236cc06f0fd16b45bafec1f3cb6efb1108c7bf2ea683708373ebd
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to external PDF files hosted on a domain that appears to be part of a link farm. This technique is often used to obscure malicious intent or to distribute further payloads. The ML classifier strongly indicated maliciousness, and the PDF structure itself is flagged as suspicious for SEO link farming.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://kiteeearpdf.myhome.cx/1f210f217f210f217f210f218/B-nderg-rde-I-Danmark-1789-90-Byggeskik-P-Landboreformernes-Tid-by-Grith-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f217f211f217/Boundary-Crossing-Of-Brownian-Motion-Its-Relation-To-The-Law-Of-The-Iterated-Logarithm-And-To-Sequential-Analysis-C-Hans-Rudolf-Lerche-by-H-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f215f213f212/Die-Lerche-Aus-Leipzig-by-Cordula-Schurig.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f218f215f213/28-Tage-Erfolgs-Programm-by-Manuela-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f218f215f215/SMS-H4U---short-cuts-and-acronyms-by-Manuela-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f216f218f217/Dynamical-Geology-of-Salt-and-Related-Structures-by-I-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f215f213f213/Anesthesia-and-Analgesia-for-Veterinary-Technicians-by-Phillip-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f217f211f212/Recent-Developments-in-String-Theory-by-Wolfgang-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/9f210f215f219f213f218/Gesang-Der-Lerche-Song-of-the-Lark-by-Willa-Cather.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f218f214f212/Inverse-and-Risk-Methods-in-Hydrocarbon-Exploration-A-Compendium-by-Ian-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f217f211f218/Economics-of-Petroleum-Production-A-Compendium-Volume-2-Value-and-Worth-by-Ian-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f216f212f219/Impact-of-Natural-Hazards-on-Oil-and-Gas-Extraction-The-South-Caspian-Basin-by-Ian-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f217f210f217/Lebe-Deine-Berufung-und-werde-reich-Coaching-3-by-Manuela-Lerche.pdf
    • http://kiteeearpdf.myhome.cx/8f214f214f217f213f211/1789-the-Emblems-of-Reason-by-Jean-Starobinski.pdf
    • http://kiteeearpdf.myhome.cx/6f215f217f210f214f210/The-State-of-Society-in-France-Before-the-Revolution-of-1789-by-Tocqueville.pdf
    • http://kiteeearpdf.myhome.cx/8f215f218f219f212f218/Christianity-under-the-Ancien-R-gime-1648-1789-by-W-R-Ward.pdf
    • http://kiteeearpdf.myhome.cx/2f213f216f214f211/The-Glorious-Cause-The-American-Revolution-1763-1789-by-Robert-Middlekauff.pdf
    • http://kiteeearpdf.myhome.cx/7f213f214f210f217f213/Le-sinistre-in-Europa-dal-1789-ai-nostri-giorni-by-David-Caute.pdf
    • http://kiteeearpdf.myhome.cx/1f211f210f212f211f210f212/Europa-1789-Aufklarung-Verklarung-Verfall-by-Werner-Hofmann.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f217f215f210f214/A-Favor-for-Marie-Antoinette-1789-The-Revolution-Begins-by-Lindy-Vinke.pdf
    • http://kiteeearpdf.myhome.cx/1f210f217f210f217f211f212/Recent-Developments-in-String-Th