Malicious PDF — malware analysis report

Static analysis result for SHA-256 1113a3566d92e4e2…

MALICIOUS

PDF

33.0 KB Created: 2018-06-11 08:36:54 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c36919f59afb568c40cda3609364aec2 SHA-1: 72d17514ff43d7e1e824eb876229d0a4b13f202e SHA-256: 1113a3566d92e4e2f5ad79a42f091399f50d09f671988b1db016cda3fd6d79d4
102 Risk Score

Malware Insights

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

The PDF was flagged by an ML classifier as malicious and contains heuristics indicating it is a fake download lure. The document body and embedded URLs point to a domain designed to trick users into downloading further malicious content, likely a second-stage payload. The primary URLs associated with the fake download are http://uncpbisdegree.com/download3.php?q=solution-radiative-heat-transfer-modest.pdf and http://uncpbisdegree.com/download4.php?q=solution-radiative-heat-transfer-modest.pdf.

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=solution-radiative-heat-transfer-modest.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=solution-radiative-heat-transfer-modest.pdfIn PDF document text
    • http://notrickszone.com/2017/08/10/new-engineering-textbook-asserts-the-impact-of-co2-emissions-on-climate-is-negligible/In PDF document text
    • http://www.enigmatic-consulting.com/semiconductor_processing/CVD_Fundamentals/xprt/Plug_reactor.htmlIn PDF document text
    • http://clivebest.com/blog/?p=1169In PDF document text
    • http://www.biocab.org/Mean_Free_Path_Length_Photons.htmlIn PDF document text
    • http://www.projectrho.com/public_html/rocket/spacewardefense.phpIn PDF document text
    • http://www.projectrho.com/public_html/rocket/basicdesign.phpIn PDF document text
    • http://www.drroyspencer.com/2017/11/uah-global-temperature-update-for-october-2017-0-63-deg-c/In PDF document text
    • https://judithcurry.com/2018/02/05/marvel-et-al-s-new-paper-on-estimating-climate-sensitivity-from-observations/In PDF document text
    • http://www.howeverythingworks.org/prints.php?topic=complete&page=1In PDF document text
    • http://dumbscientist.com/archives/abrupt-climate-changeIn PDF document text
    • http://notrickszone.com/In PDF document text
    • http://joannenova.com.au/2010/07/the-unskeptical-guide-to-the-skeptics-handbook/In PDF document text
    • http://www.cfact.org/2016/01/26/measuring-global-temperatures-satellites-or-thermometers/In PDF document text
    • http://limavedettestv.com/daysi-araujo-la-mas-deseada-del-peru-fuente-perutops/In PDF document text
    • http://riverside-resort.net/1/types-of-catholic-priests.pdfIn PDF document text
    • http://riverside-resort.net/1/the-city-of-devi-manil-suri.pdfIn PDF document text
    • http://riverside-resort.net/1/the-planetary-omnibus.pdfIn PDF document text
    • http://riverside-resort.net/1/study-questions-who-moved-my-cheese.pdfIn PDF document text
    • http://riverside-resort.net/1/the-mammoth-book-of-westerns.pdfIn PDF document text
    • http://riverside-resort.net/1/tell-it-to-a-glaswegian.pdfIn PDF document text
    • http://riverside-resort.net/1/test-item-bias.pdfIn PDF document text
    • http://riverside-resort.net/1/study-guide-for-icnd1-todd.pdfIn PDF document text
    • http://riverside-resort.net/1/the-children-of-old-leech-a-tribute-to-carnivorous-cosmos-laird-barron-ross-e-lockhart.pdfIn PDF document text
    • http://riverside-resort.net/1/target-publication-question-bank.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/Atmospheric_entryIn PDF document text
    • http://www.drawdown.org/solutions/materials/refrigerant-managementIn PDF document text
    • http://www.lowtechmagazine.com/2008/12/tile-stoves.htmlIn PDF document text
    • https://fr.wikipedia.org/wiki/Loi_de_Beer-LambertIn PDF document text
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=FR_EN&a=https%3a%2f%2ffr.wikipedia.org%2fwiki%2fLoi_de_Beer-LambertIn PDF document text
    • http://blogs.discovermagazine.com/imageo/2018/03/12/what-science-says-about-role-of-co2-in-climate-change/In PDF document text
    • http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392009000100002In PDF document text
    • http://go.microsoft.com/fwlink/?LinkId=521839&CLCID=0409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=246338&CLCID=0409In PDF document text
    • https://go.microsoft.com/fwlink/?linkid=868922In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=286759&CLCID=409In PDF document text
    • http://go.microsoft.com/fwlink/?LinkID=617297In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47E0 9872 bytes
SHA-256: e714145e0da45ee024bd277a4d0854c924205f3d157e7d45db3591f17798094a
font_01_sfnt_off00006748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6748 6768 bytes
SHA-256: 915ae6b89b2b00fa44057196117bb3bbeafa072595ef168e32a996b4b5eeec00