Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b4d16a18c4e4899…

MALICIOUS

PDF

23.3 KB Created: 2020-03-14 00:30:10 +00:00 Authoring application: mPDF 5.7
MD5: d72b299dc62b388b87003d7d335a85c5 SHA-1: fded3d527808947ab8a40c8efcc18f25e5159669 SHA-256: 2b4d16a18c4e4899aad8b04b3ecec0fc4775c77344f9cba52427ea739016facc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious. The embedded URLs point to a domain with long, numeric slugs, suggesting a potential SEO poisoning or content farm for distributing malicious payloads. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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-9912902-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-9912902-0
  • 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://calistazz.myhome.cx/1861868868861868861/Namen-Bei-Thomas-Mann-in-Den--Erzaehlungen--Und-Den-Romanen--Buddenbrooks---Koenigliche-Hoheit---Der-Zauberberg--by-Siegmar-Tyroff.pdf
    • http://calistazz.myhome.cx/9862867867867865/Complete-Thomas-Mann---Buddenbrooks-Verfall-einer-Familie-Der-Tod-in-Venedig-Tonio-Kr-ger-Der-kleine-Herr-Friedemann-Tristan-K-nigliche-Hoheit-Gladius-Dei-Schwere-Stunde-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/9862863867863864/Die-gro-en-H-rspiele-Buddenbrooks-Der-Zauberberg-Der-Tod-in-Venedig-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/1861868868861863863/K-ningliche-Hoheit-Lotte-in-Weimar-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/9869860863865865/Der-Zauberberg-In-der-Fassung-der-Gro-en-kommentierten-Frankfurter-Ausgabe-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/9862863867863865/Buddenbrooks-by-Thomas-Mann-Summary-amp-Study-Guide-by-BookRags.pdf
    • http://calistazz.myhome.cx/9862863867864862/Thomas-Mann-Buddenbrooks---Verfall-einer-Familie----Kurzfassung-by-Dieter-Hattrup.pdf
    • http://calistazz.myhome.cx/9862863867864864/The-Problematic-Bourgeois-Twentieth-Century-Criticism-on-Thomas-Mann-s-Buddenbrooks-and-the-Magic-Mountain-by-Hugh-Ridley.pdf
    • http://calistazz.myhome.cx/1861863862865863868/Mann-Der-Zauberberg-by-Martin-Swales.pdf
    • http://calistazz.myhome.cx/8869868865860869/Puzzles-of-the-Body-The-Labyrinth-in-Kafka-s-Prozess-Hesse-s-Steppenwolf-and-Mann-s-Zauberberg-by-David-Kenosian.pdf
    • http://calistazz.myhome.cx/9862863868865866/Die-Philosophie-Schopenhauers-Und-Nietzsches-in-Thomas-Manns-Buddenbrooks-by-Kerstin-Schramm.pdf
    • http://calistazz.myhome.cx/1861863862865865860/Das-quot-Zauberberg-quot--Symposium-1994-in-Davos-by-Thomas-Sprecher.pdf
    • http://calistazz.myhome.cx/9862863868865868/Darstellung-und-Funktion-der-Neurasthenie-in-Thomas-Manns-quot-Buddenbrooks-quot-by-Sascha-Engels.pdf
    • http://calistazz.myhome.cx/1861860868869862865/Schopenhauer-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/5867862863867866/Der-Tod-in-Venedig-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/3861866860869865/Bashan-and-I-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/8864862865864866/Death-in-Venice-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/6869864868867/Doctor-Faustus-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/4863861866863865/Reflections-of-a-Nonpolitical-Man-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/3867861867862868/The-Magic-Mountain-by-Thomas-Mann.pdf
    • http://calistazz.myhome.cx/9862867867867865/Complete-Tho

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