Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa6c27e02bf90dd…

MALICIOUS

PDF

33.2 KB Created: 2018-06-11 09:36:28 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-08-25
MD5: 8cbfbcc22fe22cbfb0c79051c797dbf4 SHA-1: 1a9c70cea4a419e01343a57394171f3361ffd84b SHA-256: 8aa6c27e02bf90dddf474cfe8d0ae8529253ad071931958594d4fa802fd195e7
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9269

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.
  • PDF carries a PHP-gateway SEO-spam PDF link farm medium PDF_SEO_PHP_GATEWAY_LINK_FARM
    PDF contains four or more clickable links whose target is a `.php` gateway with a multi-word search-PHRASE document slug embedded after it (e.g. 'index.php?.../binary+options+trading+nz.pdf' or 'pdf.php/cialis-dosage-side-effects.pdf'). Legitimate PHP-served documents use a filename or numeric id, not a search-query phrase, so this is the generated SEO link-farm shape — pharma / binary-options / 'free download' spam that ranks for queries and routes users into payload/redirect chains. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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
  • 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-masada-complex.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=the-masada-complex.pdfIn PDF document text
    • http://www.ibookisrael.com/tour/masada/entrance-to-masada-the-masada-packageIn PDF document text
    • http://samilitaryhistory.org/vol144ds.htmlIn PDF document text
    • http://www.fixmyhernia.com.au/In PDF document text
    • https://www.willner.com/In PDF document text
    • http://www.hsbc.co.in/1/2/miscellaneous/rtgs/rtgs-uttar-pradeshIn PDF document text
    • http://patrimonio-de-la-humanidad.com/In PDF document text
    • http://energyandvibration.com/geometry.htmIn PDF document text
    • http://www.israeltourismconsultants.com/Travel/Destinations/Israel/Christian-Tours/Where-it-all-Began-Holy-Land-Egypt-Jordan-Israel-Tour/overviewIn PDF document text
    • http://www.inspirationcruises.com/christian-tours/family-research-council-israel-2018In PDF document text
    • https://www.tazzakitchen.com/location/trenholmplazaIn PDF document text
    • https://archaeologicalpaths.com/tours,egypt-royal-tourIn PDF document text
    • http://riverside-resort.net/1/student-exploration-gizmo-answer-key-basic-prism.pdfIn PDF document text
    • http://riverside-resort.net/1/tevion-mp4-player-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/the-living-cosmos-our-search-for-life-in-universe-chris-impey.pdfIn PDF document text
    • http://riverside-resort.net/1/text-annette.pdfIn PDF document text
    • http://riverside-resort.net/1/the-bezels-of-wisdom-classics-of-western-spirituality.pdfIn PDF document text
    • http://riverside-resort.net/1/some-aspects-of-indian-culture-reprint.pdfIn PDF document text
    • http://riverside-resort.net/1/the-bread-of-salt-and-other-stories-nvm-gonzalez.pdfIn PDF document text
    • http://riverside-resort.net/1/the-hot-zone-questions-and-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/systems---control-letters.pdfIn PDF document text
    • http://riverside-resort.net/1/uic-exam-meler-240.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.jewishvirtuallibrary.org/jsource/Archaeology/Masada1.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/MasadaIn PDF document text
    • https://www.history.com/topics/masadaIn PDF document text
    • https://www.planetware.com/dead-sea/masada-isr-st-md.htmIn PDF document text
    • https://www.planetware.com/tourist-attractions-/dead-sea-isr-st-ds.htmIn PDF document text
    • https://en.wikipedia.org/wiki/John_ZornIn PDF document text
    • https://www.telegraph.co.uk/news/2018/04/16/day-ad-73roman-soldiers-breach-fearsome-masada-fortress-shocked/In PDF document text
    • https://www.britannica.com/place/AngkorIn PDF document text
    • http://whc.unesco.org/en/list/%26order=countryIn PDF document text
    • https://www.britannica.com/biography/Peter-OTooleIn PDF document text
    • http://www.jewishvirtuallibrary.org/jsource/Archaeology/Qumran.htmlIn PDF document text
    • http://www.latimes.com/local/lanow/la-me-robin-williams-dies-20140811-story.htmlIn PDF document text
    • https://www.southampton.ac.uk/courses/modules.pageIn 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_off00004804.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4804 10104 bytes
SHA-256: e6237576de4c7b937b7bb97829c8a220f833d1afb8162fd39792dd522ac94da5
font_01_sfnt_off00006840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6840 6616 bytes
SHA-256: 9f5218f4975f722b182f16f4812765cd10adbc7e072baf7658d55992742efe2c