Malicious PDF — malware analysis report

Static analysis result for SHA-256 df61ea9e8f2989c8…

MALICIOUS

PDF

36.4 KB Created: 2018-06-11 09:09:40 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 019615c9d96ab392c4d714e6a5e2908e SHA-1: 717adb79c6391d8f658ffe8a2ecc86722cfac807 SHA-256: df61ea9e8f2989c88817a5ebd83c51c3ed5e2ad17f21213dbc923e77a4d04aec
102 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9373

Heuristics 4

  • Fake 'free download' SEO-poisoning PDF critical PDF_SEO_FAKE_DOWNLOAD
    The ML classifier flagged this PDF AND it carries a visual download/call-to-action lure AND an off-domain server-side download-gateway link whose query string names a document payload. This three-signal conjunction is the fake-document / 'free PDF download' SEO-poisoning delivery pattern: the page is padded with benign decoy links to dilute classifier scores while funnelling the victim through the gateway to malware/scareware. Acting only on the conjunction keeps benign download-bearing PDFs from being misflagged.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://uncpbisdegree.com/download3.php?q=study-guide-of-business-studies-grade-12.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=study-guide-of-business-studies-grade-12.pdfIn PDF document text
    • http://cup.co.za/products/study-master-study-guide-business-studies-grade-12-caps-9781316506271In PDF document text
    • http://studyguide.net/In PDF document text
    • http://www.gadoe.org/Curriculum-Instruction-and-Assessment/Assessment/Documents/EOCTIn PDF document text
    • http://ecexams.co.za/2012In PDF document text
    • https://educonnect.co.za/grade-12/In PDF document text
    • http://www.ocr.org.uk/qualifications/gcse/gcse-business-studies-j253-from-2012/In PDF document text
    • http://www.lebowakgomocircuit.co.za/GradeIn PDF document text
    • http://theanswer.co.za/In PDF document text
    • http://www.texaspsp.org/In PDF document text
    • http://mypatentbar.com/this-study-guide/In PDF document text
    • http://www.policepath.com/In PDF document text
    • https://www.georgiastandards.org/Georgia-Standards/Documents/Social-Studies-Economics-Georgia-Standards.pdfIn PDF document text
    • http://www.edulanka.lk/syllabus/grade12-13In PDF document text
    • http://uncpbisdegree.com/1/service-manual-for-2003-honda-metropolitan.pdfIn PDF document text
    • http://riverside-resort.net/1/uptet-2015-answer-key-paper-i-amp-ii-set-wise-solution.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-adventures-of-super-diaper-baby-1-dav-pilkey.pdfIn PDF document text
    • http://uncpbisdegree.com/1/test-question-best-practices.pdfIn PDF document text
    • http://uncpbisdegree.com/1/super-safe-mark-exam-study-guide.pdfIn PDF document text
    • http://uncpbisdegree.com/1/test-questions-for-bookkeeper-with-and-answers.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-jeffery-method-of-horse-handling.pdfIn PDF document text
    • http://riverside-resort.net/1/vibrational-spectroscopy-of-solids.pdfIn PDF document text
    • http://riverside-resort.net/1/vocabulary-workshop-level-f-unit-2-answers-2012.pdfIn PDF document text
    • http://uncpbisdegree.com/1/storyworks-answer-key-january-2014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.takealot.com/the-answer-series-grade-12-business-studies-3in1-caps-study-guid/PLID40119608In PDF document text
    • https://study.com/academy/subj/business.htmlIn PDF document text
    • https://study.com/academy/course/index.htmlIn PDF document text
    • http://www.studyisland.com/In PDF document text
    • https://study.com/academy/level/middle-school/6th-grade.htmlIn PDF document text
    • https://study.com/academy/level/middle-school.htmlIn PDF document text
    • https://www.hubspot.com/customersIn PDF document text
    • https://www.iie.org/en/Research-and-Insights/PublicationsIn PDF document text
    • https://quizlet.com/In PDF document text
    • https://www.michigan.gov/documents/mde/3rdgradeSSGLCE_229667_7.pdfIn PDF document text
    • https://www.thestudentroom.co.uk/wiki/Business_StudiesIn PDF document text
    • http://owl.english.purdue.edu/In PDF document text
    • http://guide.wisc.edu/undergraduate/In PDF document text
    • https://www.nytimes.com/2010/09/07/health/views/07mind.htmlIn PDF document text
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409In PDF document text
    • https://go.microsoft.com/fwlink/?linkid=868922In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617297In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F8D 10660 bytes
SHA-256: 5149270afb3d0aa11f82c175020924eb50141a17c66af73a6433af8a91dd6eac
font_01_sfnt_off00007158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7158 7632 bytes
SHA-256: e59430bd3afeac3ebd83fce171daaa78bbe7be510637e79942eddabd01bdc71c