Malicious PDF — malware analysis report

Static analysis result for SHA-256 0259fb036a6d8099…

MALICIOUS

PDF

35.1 KB Created: 2018-06-11 09:10:49 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7)
MD5: f2047cd61929e1904ab82ad70a7193a9 SHA-1: f8052b99ab572f7ef086de59a2176c40507292b6 SHA-256: 0259fb036a6d809923cc5c2cdd07aee037b60531bbe0f9ecac79c262528f75a4
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 'free download' SEO-poisoning lure. The document body and extracted URLs point to `uncpbisdegree.com`, which is likely hosting a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9454

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-precious-treasury-of-the-way-of-abiding-1st-edition.pdf
    • http://uncpbisdegree.com/download4.php?q=the-precious-treasury-of-the-way-of-abiding-1st-edition.pdf
    • http://www.goldsilverbullion.com/BullionMarketInsights.htm
    • http://www.earlychristianwritings.com/text/diatessaron.html
    • http://www.preceptaustin.org/john_commentaries
    • http://www.catholicprophecy.net/
    • http://www.foodtimeline.org/foodfaq2.html
    • http://www.wrgn.com/library.php?name=results.php
    • http://brizek.com/prayer/pieta.htm
    • http://www.shapell.org/Collection
    • http://jahtruth.net/illumin.htm
    • http://www.undergroundnotes.com/freedom.htm
    • https://thestandard.org.nz/open-mike-22-01-2018-2/
    • http://www.mybrightonandhove.org.uk/page.aspx?id=5365
    • http://www.shtfplan.com/headline-news/you-have-been-targeted-for-internment-resettlement_02222014
    • http://riverside-resort.net/1/staar-test-answer-sheet-2017.pdf
    • http://riverside-resort.net/1/solution-manual-intermediate-accounting-kieso-13e.pdf
    • http://riverside-resort.net/1/sustainable-alternate-land-use-systems-for-drylands.pdf
    • http://riverside-resort.net/1/the-electrical-field-a-novel.pdf
    • http://riverside-resort.net/1/teen-pregnancy-essay-paper.pdf
    • http://riverside-resort.net/1/the-hidden-plague-a-field-guide-for-surviving-overcoming-hidradenitis-suppurativa.pdf
    • http://riverside-resort.net/1/surgery-journal.pdf
    • http://riverside-resort.net/1/silk-processing-properties-and-applications.pdf
    • http://riverside-resort.net/1/statistics-gcse-predicted-paper-pixel.pdf
    • http://riverside-resort.net/1/tv-guide-telephone-number.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://en.wikipedia.org/wiki/Joint_Comprehensive_Plan_of_Action
    • http://oll.libertyfund.org/titles/hamilton-the-revolutionary-writings-of-alexander-hamilton
    • https://en.wikipedia.org/wiki/Loyalty
    • 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://oll.libertyfund.org/titles/spinoza-the-chief-works-of-benedict-de-spinoza-vol-1
    • https://y.qq.com/
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=ZH-CHS_EN&a=https%3a%2f%2fy.qq.com%2f
    • http://www.loot.co.za/index/html/index3385.html
    • https://en.wikiquote.org/wiki/Winston_Churchill
    • https://en.wikiquote.org/wiki/Mahatma_Gandhi
    • http://www.thisismoney.co.uk/money/cars/article-2773752/You-tear-tax-disc-tomorrow-Levy-shake-discs-abolished-drivers-able-pay-monthly-direct-debit.html
    • https://reason.com/archives/2018/05/10/two-new-court-decisions-are-quietly-elim
    • 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_off00004ca4.bin
eedfb7e2a68bd20423972bc78f39103f9fa5eeb1a11239e44876c6b174c43bf5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA4 10156 bytes
font_01_sfnt_off00006d10.bin
981c69670b3c2462897fd0724c21093aa3dc5f3fe165985dfdf8d99e38846c64		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D10 7528 bytes

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