Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdf888dda88d0afa…

MALICIOUS

PDF

68.1 KB Created: 2021-03-30 19:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e145256419325ce9750557fcea36f028 SHA-1: 411f526eb90e256f63d083f29fbd979c9c1f7008 SHA-256: bdf888dda88d0afa28954961312eb401a42990671168f124f17a1b466ae16144
94 Risk Score

Malware Insights

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

The PDF file contains a deceptive title and numerous external links, indicating it is part of a link farm designed to drive traffic to other malicious or spam sites. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links suggests a tactic to obscure the ultimate malicious destination. No scripts were extracted, but the PDF structure itself is used to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8462

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://kuzutuzo.ru/award?keyword=trial+advocacy+skills+pdf
    • https://mabiredozex.weebly.com/uploads/1/3/4/4/134482212/xolenowojupaf.pdf
    • https://static.s123-cdn-static.com/uploads/4382429/normal_6004c17eefcde.pdf
    • https://gotagifegu.weebly.com/uploads/1/3/1/6/131607164/piwizex.pdf
    • https://labopepiw.weebly.com/uploads/1/3/4/7/134747507/410e4.pdf
    • https://zipawesijapa.weebly.com/uploads/1/3/4/4/134494223/dolofasosu.pdf
    • https://kudizuvawemexol.weebly.com/uploads/1/3/4/3/134307781/38eb075.pdf
    • https://cdn-cms.f-static.net/uploads/4445742/normal_5fd644ee3e3b6.pdf
    • https://cdn-cms.f-static.net/uploads/4455406/normal_60340051e0026.pdf
    • https://cdn.sqhk.co/tokafumotebi/4ibhcun/82328676879.pdf
    • https://jebovemedafo.weebly.com/uploads/1/3/0/8/130813903/jologub.pdf
    • https://suxifobafip.weebly.com/uploads/1/3/4/3/134370270/8fcea45.pdf
    • https://turabebusaweni.weebly.com/uploads/1/3/1/4/131438207/pugubabozaxoguxizi.pdf
    • https://xokotenesuku.weebly.com/uploads/1/3/1/4/131438709/5885571.pdf
    • https://cdn-cms.f-static.net/uploads/4491155/normal_60460aa943ce5.pdf
    • https://cdn.sqhk.co/mujejadalale/3CILihY/rixowurujotabenapakuv.pdf
    • https://cdn-cms.f-static.net/uploads/4407807/normal_601e68b1c37f5.pdf
    • https://bofazereb.weebly.com/uploads/1/3/4/6/134675062/39177a5cfaf376.pdf
    • https://cdn.sqhk.co/jepipovi/hBMjbgg/xominuxej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6d6.bin
3779cb425dc45600734a3a3d47649821d44c67c39ca5072dd7603e54145facfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D6 4808 bytes

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