Malicious PDF — malware analysis report

Static analysis result for SHA-256 07e5a17bbe7de736…

MALICIOUS

PDF

34.2 KB Created: 2018-06-11 09:16:10 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 19f60d459bc0d0fb2a2544f502d54d1f SHA-1: 68d2e8fae0a5c9eccc978a047ab0b202b0635733 SHA-256: 07e5a17bbe7de7361c650883d1972719ebd5c8cfbefc2788fee18383b8d3f3f1
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 lure, specifically using SEO poisoning tactics. It embeds URLs pointing to 'uncpbisdegree.com', which are likely intended to serve a malicious payload. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8778

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=the-grand-inquisitor.pdf
    • http://uncpbisdegree.com/download4.php?q=the-grand-inquisitor.pdf
    • http://uncpbisdegree.com/1/sir-gawain-and-the-green-knight.pdf
    • http://uncpbisdegree.com/1/smansa-pare-ppdb-2018.pdf
    • http://riverside-resort.net/1/worksheet-5-double-replacement-reactions-answer-key.pdf
    • http://riverside-resort.net/1/when-night-comes.pdf
    • http://uncpbisdegree.com/1/service-manual-for-ktm-530-exc-2011.pdf
    • http://uncpbisdegree.com/1/teori-tune-up-konvensional-motor-bensin.pdf
    • http://uncpbisdegree.com/1/sophie-39-s-world.pdf
    • http://uncpbisdegree.com/1/sir-malcolm-and-the-missing-prince-a-tale-of-long-ago.pdf
    • http://uncpbisdegree.com/1/space-unit-grade-2.pdf
    • http://uncpbisdegree.com/1/tess-of-the-d-study-guide-answers.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://en.m.wikipedia.org/wiki/The_Grand_Inquisitor
    • https://en.wikipedia.org/wiki/The_Grand_Inquisitor#Poem
    • https://en.wikipedia.org/wiki/The_Grand_Inquisitor#Influence_on_other_media
    • http://starwars.wikia.com/wiki/The_Grand_Inquisitor
    • https://www.mtholyoke.edu/acad/intrel/pol116/grand.htm
    • http://www.sparknotes.com/lit/brothersk/section7/
    • http://www2.hawaii.edu/~freeman/courses/phil100/11
    • http://starwars.wikia.com/wiki/Grand_Inquisitor
    • http://faculty.webster.edu/corbetre/philosophy/existentialism/dostoevsky/grand-analysis.html
    • https://www.amazon.com/Grand-Inquisitor-Fyodor-Dostoyevsky/dp/1614279691
    • https://www.amazon.com/Christianity-Religion-Spirituality-Books/b?ie=UTF8&node=12290
    • https://www.amazon.com/Fiction-Poetry-Christianity-Books/b?ie=UTF8&node=172806
    • https://en.m.wikipedia.org/wiki/Grand_inquisitor
    • https://www.cliffsnotes.com/literature/b/the-brothers-karamazov/summary-and-analysis/part-2-book-v-chapter-5
    • https://www.cliffsnotes.com/literature
    • https://www.cliffsnotes.com/literature/b/the-brothers-karamazov/book-summary
    • 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_off000048b0.bin
5b0ef84e944ef57c9818bc5fdb3cc302914a76a3b9a55600d1c356f9ba9879af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48B0 10716 bytes
font_01_sfnt_off00006a88.bin
649bba2ad58e4412bff2d32312b229db2a6d0445de4b3d80d60ff3ebb9533902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A88 7312 bytes

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