Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c6ed7470654c2ea…

MALICIOUS

PDF

34.0 KB Created: 2018-06-11 08:25:06 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: 2ed7071d3af6aab38c6940ed4b233326 SHA-1: dab3b018b21c0f02d83498093768f78223d28d9e SHA-256: 7c6ed7470654c2eae249d719b2f6ad5a1000839acffc5622458d1357c99baf9d
102 Risk Score

Malware Insights

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

The PDF is flagged as malicious by an ML classifier and specifically identified as a fake 'free download' SEO-poisoning lure. The document body contains multiple instances of the URL http://uncpbisdegree.com/download3.php?q=student-exploration-shoot-the-monkey-gizmo-answers-key.pdf, which is likely the gateway to a malicious payload. The presence of embedded URLs and the SEO poisoning heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8500

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=student-exploration-shoot-the-monkey-gizmo-answers-key.pdf
    • http://uncpbisdegree.com/download4.php?q=student-exploration-shoot-the-monkey-gizmo-answers-key.pdf
    • http://www.fidgetcube-shop.com/ex/le/explore_learning_magnetic_induction_answers_free_ebook.pdf
    • http://www.oxfordwordlist.com/pages/report.asp?mode=print
    • http://www.projectrho.com/public_html/rocket/scisociety.php
    • http://www.pangloss.com/seidel/MPoem/mass_poem.cgi
    • https://1mbed.com/
    • http://uncpbisdegree.com/1/structure-and-mobility-the-men-and-women-of-marseille-1820-1870.pdf
    • http://uncpbisdegree.com/1/solutions-morris-mano-digital-design.pdf
    • http://riverside-resort.net/1/waiting-on-the-sidelines-1-ginger-scott.pdf
    • http://riverside-resort.net/1/world-history-2-sol-review-packet-answers.pdf
    • http://riverside-resort.net/1/what-do-campaign-contributions-buy.pdf
    • http://uncpbisdegree.com/1/smart-energy-solutions-philadelphia.pdf
    • http://riverside-resort.net/1/why-does-college-cost-so-much-robert-b-archibald.pdf
    • http://uncpbisdegree.com/1/spanish-agriculture-the-long-siesta-1765-1965.pdf
    • http://uncpbisdegree.com/1/sins-we-accept.pdf
    • http://riverside-resort.net/1/xtremepapers-data-response-economics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.fox5dc.com/
    • https://www.telegraph.co.uk/environment/
    • http://www.philly.com/philly/archives/
    • https://www.nationalgeographic.com/magazine/
    • http://www.providencejournal.com/
    • http://www.dictionary.com/e/s/word-of-the-year-list/
    • http://tvtropes.org/pmwiki/pmwiki.php/Main/GilliganCut
    • http://music.163.com/
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=ZH-CHS_EN&a=http%3a%2f%2fmusic.163.com%2f
    • http://www.crosswordsolver.org/clues/l
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=FR_EN&a=https%3a%2f%2f1mbed.com%2f
    • 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_off00004774.bin
0adb6d65ace0e4b84b683f93a8f7a0d6c1b8c0a1864c132d8c0d15032e8782c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x4774 10592 bytes
font_01_sfnt_off0000690b.bin
35f5fe8cd7e8afdbb9058c2faa8e05540330dfbda03bd013df8c227b5686e4c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x690B 7424 bytes