Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d65342771c4e5c…

MALICIOUS

PDF

33.7 KB Created: 2018-06-11 09:41:09 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: d04f7bdd0146c21637f7071737e5405d SHA-1: ba5451e07e7239fc324eb288c133f46b01608fd0 SHA-256: c0d65342771c4e5cfdae95e610dca3e8b9cfbf3ad64b36efb4356cb93b93096d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded URLs and document body text that mimic a legitimate document about evolution, but the critical heuristic 'PDF_SEO_FAKE_DOWNLOAD' indicates it is a fake download lure. The primary gateway URL, http://uncpbisdegree.com/download3.php?q=understanding-evolution-a-christian-perspective.pdf, is associated with SEO-spam link farms, suggesting the document's purpose is to redirect users to malicious sites for further exploitation. The ML classifier also flagged this PDF as malicious.

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.
  • 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=understanding-evolution-a-christian-perspective.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=understanding-evolution-a-christian-perspective.pdfIn PDF document text
    • http://www.rationalrevolution.net/articles/understanding_evolution.htmIn PDF document text
    • http://christianmomthoughts.com/4-key-points-christian-kids-need-to-understand-about-evolution/In PDF document text
    • http://www.rationalrevolution.net/articles/capitalism_evolution.htmIn PDF document text
    • http://www.equip.org/article/paul-second-adam-theistic-evolution/In PDF document text
    • http://ahealedplanet.net/spirit.htmIn PDF document text
    • http://introducedrat.com/evolution.htmIn PDF document text
    • http://www.spiritualcompetency.com/In PDF document text
    • http://romans13.com/In PDF document text
    • https://www.asa3.org/ASA/resources/wiens.htmlIn PDF document text
    • http://www.teachinghearts.org/dre04legends.htmlIn PDF document text
    • http://www.drabruzzi.com/religious_movements.htmIn PDF document text
    • http://www.religion-online.org/In PDF document text
    • http://commonsenseatheism.com/?p=1852In PDF document text
    • https://www.endtime.com/understanding-the-endtime/In PDF document text
    • http://riverside-resort.net/1/snap-on-tire-changer-wiring.pdfIn PDF document text
    • http://riverside-resort.net/1/ten-ir-atgal-vienas-megabaitas-apie-vaik.pdfIn PDF document text
    • http://riverside-resort.net/1/solutions-matlab-for-psychologists-antonia.pdfIn PDF document text
    • http://riverside-resort.net/1/short-scar-rhytidectomy-2-vols.pdfIn PDF document text
    • http://riverside-resort.net/1/student-exploration-water-pollution-gizmo-answers.pdfIn PDF document text
    • http://riverside-resort.net/1/solution-manual-clifford-shaffer.pdfIn PDF document text
    • http://riverside-resort.net/1/ski-doo-skandic-1993-service-manual-503.pdfIn PDF document text
    • http://riverside-resort.net/1/the-everyday-supermodel-molly-sims.pdfIn PDF document text
    • http://riverside-resort.net/1/the-gospel-of-hip-hop-first-instrument-krs-one.pdfIn PDF document text
    • http://riverside-resort.net/1/todo-por-la-vida.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.pewforum.org/2003/01/27/sources-of-basic-human-rights-ideas-a-christian-perspective/In PDF document text
    • https://en.wikipedia.org/wiki/Spiritual_evolutionIn PDF document text
    • https://en.wikipedia.org/wiki/EvolutionIn PDF document text
    • http://www.religioustolerance.org/evolutio.htmIn PDF document text
    • https://www.gotquestions.org/Christian-modernism.htmlIn PDF document text
    • https://abc-clio.com/ABC-CLIOGreenwood.aspxIn PDF document text
    • https://topdocumentaryfilms.com/evolution-vs-god/In PDF document text
    • https://carm.org/In 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_off0000479a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x479A 10512 bytes
SHA-256: e31f94e1473e2192a9685c8ddf5ecc5f73a467c0ef5fb436be05798efa2b14ea
font_01_sfnt_off000068f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68F4 7080 bytes
SHA-256: a0cb233d1d9b4a39af81bdc73d7dd3dd557dc03eab42e951ea476f7405277f2a