Malicious PDF — malware analysis report

Static analysis result for SHA-256 74889544fcbb02cb…

MALICIOUS

PDF

18.3 KB Created: 2020-03-16 23:41:08 +00:00 Authoring application: mPDF 5.7
MD5: c5d9a7f605d19a5eac3d39080208b4df SHA-1: cbc956e7827a850a88f1f9b1884e88dc44c1cdde SHA-256: 74889544fcbb02cbc00d3b655a27e8774323d3be7f7a54ab3cc808da05b7a8e7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF documents on a suspicious domain, indicative of a link farm or SEO poisoning tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the embedded URLs are the primary indicators of malicious intent, likely to drive traffic or distribute further content.

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/8868861868864869/Aphorismen-zur-Lebensweisheit-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1860862864865865862/The-Art-of-Literature-Nine-Essays-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/6865867869861/Essays-and-Aphorisms-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/1861860868867868861/Essay-on-the-Freedom-of-the-Will-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/1861860868867868867/The-World-as-Will-and-Idea-Abridged-in-1-Vol-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/9864865862862862/Der-handschriftliche-Nachla-in-5-B-nden-by-Arthur-Schopenhauer.pdf
    • http://calistazz.myhome.cx/1861860869860860868/Arthur-Schopenhauer-The-World-as-Will-and-Idea-by-Irwin-Edman.pdf
    • http://calistazz.myhome.cx/1861860868868864868/Philosophical-Writings-Arthur-Schopenhauer-by-Wolfgang-Schirmacher.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/1861862868865860863/Law-Economics-and-Morality-Law-Economics-and-Morality-by-Eyal-Zamir.pdf
    • http://calistazz.myhome.cx/7860863860869867/On-the-basis-of-cinema-by-Yuri-Tynyanov.pdf
    • http://calistazz.myhome.cx/1861869862865862868/Geheimakte-Mars-06-Die-versunkene-Basis-by-D-W-McGillen.pdf
    • http://calistazz.myhome.cx/9868860864865863/Bildung-Ohne-Basis-by-Georg-Hahn.pdf

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