Malicious PDF — malware analysis report

Static analysis result for SHA-256 654728d154108daa…

MALICIOUS

PDF

18.6 KB Created: 2020-03-16 23:45:25 +00:00 Authoring application: mPDF 5.7
MD5: 1b1fd2ccd22be5267a6d6a90b6ef676b SHA-1: 7493aa2b9d9ec48ba0d885cc9c287ef037e755e5 SHA-256: 654728d154108daa98473c35b7640bbd9aab77dc0fe1a08530c3c508308ae600
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits a critical heuristic for a link farm, embedding numerous external links to other PDF files. While no scripts were directly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest a malicious intent, possibly to distribute further malware or engage in SEO manipulation. The primary attack vector is likely spearphishing attachment, with the embedded URLs serving as the main IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://calistazz.myhome.cx/1861860868867869864/The-Essential-Schopenhauer-Essays-amp-Selections-from-The-World-as-Will-amp-Representation-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861860868869863862/The-Philosophy-of-Schopenhauer-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861860868867863866/Essays-of-Schopenhauer-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/8865864869863/The-World-as-Will-and-Representation-Vol-2-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861860868867868866/The-Basis-of-Morality-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1860862864865865862/The-Art-of-Literature-Nine-Essays-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861860868867868861/Essay-on-the-Freedom-of-the-Will-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/6865867869861/Essays-and-Aphorisms-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/9864865862862862/Der-handschriftliche-Nachla-in-5-B-nden-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861860868867868867/The-World-as-Will-and-Idea-Abridged-in-1-Vol-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/6864861861864/The-Horrors-and-Absurdities-of-Religion-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861860869860860867/The-World-as-Will-and-Idea-Volume-3-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861860868868864868/Philosophical-Writings-Arthur-Schopenhauer-by-Wolfgang-Schirmacher.pdf
    • http://calistazz.myhome.cx/1861860869860860868/Arthur-Schopenhauer-The-World-as-Will-and-Idea-by-Irwin-Edman.pdf
    • http://calistazz.myhome.cx/5864864865860861/L-Art-d-avoir-toujours-raison-suivi-de-La-lecture-et-les-livres-et-Penseurs-personnels-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861864863869868865/Das-Erotische-Unbehagen-in-Der-Russischen-Literatur-Um-1900-Subversive-Entsagung-Von-Arthur-Schopenhauer-Uber-Lev-Tolstoj-Und-Vladimir-Solov-ev-Zu-Fedor-Sologub-by-Cristina-Beretta.pdf
    • http://calistazz.myhome.cx/1860864869868869867/Geborgenheit-in-Universenweiten-Sagenhafte-Aphorismen-by-Ludwig-Weibel.pdf
    • http://calistazz.myhome.cx/1860867862867866861/Mit-Liebe-durchs-Leben-an-deiner-Hand-Gedichte-und-Aphorismen-by-Christl-Albrecht.pdf
    • http://calistazz.myhome.cx/1860865863869868863/Betrachtungen-zum-Zeitgeschehen-Betrachtungen-Reden-Aphorismen-1-by-Franz-Werfel.pdf
    • http://calistazz.myhome.cx/1861860868868865864/A-Guide-to-Schopenhauer-by-Will-Durant.pdf