Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1151c5e423db33f…

MALICIOUS

PDF

69.5 KB Created: 2021-02-25 13:08:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 052e5b5e1a2f49853edb563f88641072 SHA-1: 5804008632d63e623e7141e9989dcea426a29441 SHA-256: f1151c5e423db33fd40f44777ba1968fac023b7d43ccae0838eb51717d650a2b
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document, likely used as a lure to direct users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8464

Heuristics 4

  • 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.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/award?keyword=the+professor+and+the+madman+imdb+trivia
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/vimowivo.pdf
    • https://wasavegod.weebly.com/uploads/1/3/4/5/134589575/kasijo-pisagisalesoga-davarubumerew.pdf
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/lotezo.pdf
    • https://static.s123-cdn-static.com/uploads/4447263/normal_5fc598c1cca29.pdf
    • http://bitcoinlearningcentre.online/behaviour_management_plan_template_in_childcarepg5fn.pdf
    • https://wekexobesunolo.weebly.com/uploads/1/3/0/7/130739288/9866128.pdf
    • http://lezigovedavide.getenjoyment.net/critical_thinking_skills_meaning.pdf
    • https://cdn-cms.f-static.net/uploads/4425484/normal_5fd2cd0e90e8f.pdf
    • https://cdn-cms.f-static.net/uploads/4467612/normal_6018169c33bfd.pdf
    • http://bonboxstudio.com/99193439586mdjg1.pdf
    • http://teksalon.xyz/85360872509ppr7d.pdf
    • https://cdn-cms.f-static.net/uploads/4491439/normal_602fcf8d60ca7.pdf
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/8645331.pdf
    • https://seporarutigofu.weebly.com/uploads/1/3/2/7/132741198/d57ef5eae15c2.pdf
    • https://cdn-cms.f-static.net/uploads/4469837/normal_60312939688a5.pdf
    • https://kejarokelevu.weebly.com/uploads/1/3/5/2/135297316/tajemasasinoniforoja.pdf
    • http://xtreme-sport.ru/stairway_to_heaven_vernon_nj_maphzjtl.pdf
    • https://mapunexi.weebly.com/uploads/1/3/3/9/133999872/2929323.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/ruzaganog/vakezisomevoku.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c6.bin
caae152d79e4ca2ed39166a6c24564b1382cc1d57b81eb502660d0a80141eb65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C6 5400 bytes

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