Malicious PDF — malware analysis report

Static analysis result for SHA-256 162fcb56652557c8…

MALICIOUS

PDF

33.9 KB Created: 2018-06-11 09:23:47 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 2e0c00e5c55ecdc4103e68a6e89ea029 SHA-1: 60ae1b2518355d665f0500294b00fe25e1d9608e SHA-256: 162fcb56652557c8ffcb185f936f4fe827f395d01eec5bdba74f53947d22eca3
102 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a fake download page designed for SEO poisoning, directing users to download a malicious file. The document body and extracted URLs reinforce this, with multiple links pointing to download-related PHP scripts on the 'uncpbisdegree.com' domain. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9340

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=university-of-westminster-january-intake.pdf
    • http://uncpbisdegree.com/download4.php?q=university-of-westminster-january-intake.pdf
    • http://www.ilwindia.com/uk-university-january-intake-courses/
    • http://www.studylondon.ac.uk/application-advice/faqs/january-and-february-courses
    • http://geebeeworld.com/latest-news/all-others/courses-offered-canadian-institutes-2017-intake/
    • http://geebeeworld.com/latest-news
    • http://geebeeworld.com/latest-news/category/all-others/
    • http://www.campusmalaysia.com/institution
    • http://www.campusmalaysia.com/
    • http://www.bibme.org/
    • http://www.ilwindia.com/
    • http://www.scholars4dev.com/3482/international-undergraduate-scholarships-at-humber-college-canada/
    • http://studymore.org.uk/ssctim.htm
    • http://canadianimmigrant.ca/canadas-top-25-immigrants
    • http://riverside-resort.net/1/water-and-aqueous-systems-answer-key.pdf
    • http://uncpbisdegree.com/1/the-health-of-nations-society-and-law-beyond-the-state.pdf
    • http://uncpbisdegree.com/1/the-cultural-nature-of-human-development.pdf
    • http://uncpbisdegree.com/1/the-facts-behind-the-helsinki-roccamatios.pdf
    • http://uncpbisdegree.com/1/shang-government-facts.pdf
    • http://riverside-resort.net/1/when-was-the-battle-of-fort-sumter.pdf
    • http://uncpbisdegree.com/1/study-guide-for-nccer-test-insulatin.pdf
    • http://uncpbisdegree.com/1/stihl-ms-290-310-390-service-workshop-repair-manual.pdf
    • http://riverside-resort.net/1/virtual-migration-the-programming-of-globalization.pdf
    • http://uncpbisdegree.com/1/sportsday-speech-in-sample-langauge.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://www.westminster.ac.uk/about-us/faculties/westminster-business-school/courses/mba
    • https://en.wikipedia.org/wiki/University_of_St_Andrews
    • https://en.wikipedia.org/wiki/Cambridge_University
    • http://drexel.edu/cnhp/academics/graduate/ma-art-therapy-counseling/
    • http://drexel.edu/cnhp/
    • http://drexel.edu/cnhp/academics/
    • http://drexel.edu/cnhp/academics/graduate/
    • https://www.usatoday.com/topic/D2591A44-DFD9-4D0D-AF7A-CC0B3B92CBB0/health-wellness/
    • https://onlinelibrary.wiley.com/doi/full/10.1080/00207594.2008.10108483
    • 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_off0000483a.bin
fc8fcb2efa95cf479e4b54babe1638f2140a883c211622f5b0f624aa7c79d856
pdf-font-stream PDF embedded font (sfnt) at offset 0x483A 10588 bytes
font_01_sfnt_off000069b9.bin
816014e9c1c2cccf16a93be0588a355685811fb53fa28f4b8255e0d3f21e1132
pdf-font-stream PDF embedded font (sfnt) at offset 0x69B9 7104 bytes