Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cbea0ab63d9ff4…

MALICIOUS

PDF

29.7 KB Created: 2018-06-11 08:14:08 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: b9ee2603aee515dda32e547ec8c36742 SHA-1: 2463ebdbe1375a35ae522bef5a7ea4c701f994d3 SHA-256: 03cbea0ab63d9ff4f6f594088ca6e3f099877d96878a6fc8cb0871c2baf7335f
102 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a fake download lure, specifically using SEO poisoning techniques to trick users into downloading a file. The embedded URLs, such as http://uncpbisdegree.com/download3.php?q=waec-gce-practical-physics-answer.pdf, are likely gateways to malicious payloads. The document body also contains these URLs, reinforcing the download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9525

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=waec-gce-practical-physics-answer.pdf
    • http://uncpbisdegree.com/download4.php?q=waec-gce-practical-physics-answer.pdf
    • https://www.myschoolgist.com/ng/waec-gce-nov-dec-timetable/
    • http://examcrown.co/
    • https://www.myschoolgist.com/ng/waec-may-june-timetable-free/
    • http://wikiwaparz.com/sitemap/
    • https://schoolgh.com/ucc-admission-form/
    • http://www.iaea.info/papers.aspx?id=82
    • http://riverside-resort.net/1/whispering-souls.pdf
    • http://uncpbisdegree.com/1/the-joker-a-visual-history-of-the-clown-prince-of-crime.pdf
    • http://uncpbisdegree.com/1/sweet-true-believers-2-erin-mccarthy.pdf
    • http://uncpbisdegree.com/1/speakercraft-oe8-one-speakers-owners-manual.pdf
    • http://uncpbisdegree.com/1/simpsons-episodes-with-comic-book-guy.pdf
    • http://riverside-resort.net/1/yamaha-psr-400-manual.pdf
    • http://uncpbisdegree.com/1/the-gypsys-dream-the-greek-village-collection-book-4.pdf
    • http://uncpbisdegree.com/1/study-questions-maus.pdf
    • http://riverside-resort.net/1/wiring-diagram-for-30-amp-relay.pdf
    • http://riverside-resort.net/1/ups-phone-number-customer-service.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://martinslibrary.blogspot.com/
    • http://www.sussex.ac.uk/study/masters/courses/mathematical-and-physical-sciences/data-science-msc
    • http://www.sussex.ac.uk/study/masters/courses/mathematical-and-physical-sciences
    • http://go.microsoft.com/fwlink/?LinkID=617350
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409
    • https://go.microsoft.com/fwlink/?linkid=868922
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409
    • http://go.microsoft.com/fwlink/?LinkID=617297
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicense

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000039ac.bin
c5002360fc31bc1cffbbbe3ab6c3f8c673b1d413d74ccb8651b26c9c84690590
pdf-font-stream PDF embedded font (sfnt) at offset 0x39AC 10372 bytes
font_01_sfnt_off00005a93.bin
20d912afc6c705b72bd5a4841e65b9fcf281bc7c2e395763098e1c206c018345
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A93 7072 bytes