Malicious PDF — malware analysis report

Static analysis result for SHA-256 9033cc84d471cf50…

MALICIOUS

PDF

64.0 KB Created: 2021-06-02 17:40:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e696eee6e9bb1bb7505a2247a8fad83a SHA-1: 0d5b06560147b8cda2c40a295ccba3d9bcdeaa61 SHA-256: 9033cc84d471cf50902a29b3b2ed49ba608a51ab898e9be59a6acc431b3ea394
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of external links, suggesting a link farm or phishing attempt. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports this. No scripts were extracted, but the document's structure and embedded links point towards an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9563

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 https://vilenefex.ru/123?utm_term=active+learning+template+examples
    • https://cdn-cms.f-static.net/uploads/4450336/normal_6042c30e43122.pdf
    • https://lonopenofof.weebly.com/uploads/1/3/4/8/134895818/687c2b57.pdf
    • https://cdn-cms.f-static.net/uploads/4378621/normal_5fd7d585136e7.pdf
    • https://gononazenikemad.weebly.com/uploads/1/3/4/4/134482012/jepabeba.pdf
    • https://mufunada.weebly.com/uploads/1/3/4/6/134623537/volodibizupu.pdf
    • https://vozumovoso.weebly.com/uploads/1/3/4/5/134506012/779664.pdf
    • https://menekagamop.weebly.com/uploads/1/3/4/0/134097565/texifukiroriret.pdf
    • https://votilolezin.weebly.com/uploads/1/3/4/3/134307270/3244697.pdf
    • https://bafuvaki.weebly.com/uploads/1/3/4/3/134336870/5839963.pdf
    • https://cdn-cms.f-static.net/uploads/4368500/normal_6036db316c41d.pdf
    • https://jejabulalirolu.weebly.com/uploads/1/3/4/4/134464322/navunagukom_padexikesose.pdf
    • https://cdn-cms.f-static.net/uploads/4455403/normal_605ee58d730d7.pdf
    • https://cdn-cms.f-static.net/uploads/4450724/normal_602ba7c5be812.pdf
    • https://wifojulov.weebly.com/uploads/1/3/1/4/131438113/borogo_rabikobudoledon_zafekixoxofex.pdf
    • https://siteketu.weebly.com/uploads/1/3/4/3/134362374/toreze-sekexis-fixod-rumezetozuxi.pdf
    • https://gufiferufa.weebly.com/uploads/1/3/2/3/132302963/xigisikikiwi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/52fe7899-c378-451b-be16-3c413fbdb5ee/29348013861.pdf
    • https://uploads.strikinglycdn.com/files/efec0d01-eaab-4304-a8e4-50dd7d2a4ebf/el_ahogado_mas_hermoso_del_mundo_resumen_quizlet.pdf
    • http://sijomirurefi.pbworks.com/f/dikojibixidiziv.pdf
    • https://uploads.strikinglycdn.com/files/b8cab469-eb30-43e8-ba15-e18eb3b7fe12/99507214554.pdf
    • http://pazimonofe.pbworks.com/w/file/fetch/144461094/nisuteroramodawuwu.pdf
    • http://ruwomodanom.pbworks.com/w/file/fetch/144450759/diabetes_self_management_education_near_me.pdf
    • https://uploads.strikinglycdn.com/files/2fb8519b-2efe-4fa7-bad4-48afc72e6173/codehs_answers_activity_1.10.5_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/d176f374-e3f8-487d-914f-10397c53ac93/the_maze_runner_book_set_big_w.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eedf.bin
d0bb05ac527073127c57ad6982b08e6e88d628f618a29263bc954009f0dbecc2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 5372 bytes