Malicious PDF — malware analysis report

Static analysis result for SHA-256 e98c69f93325cb4a…

MALICIOUS

PDF

32.3 KB Created: 2018-06-11 08:11:21 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 3b02fa7764fb9c28eead05dbf00681bd SHA-1: 825d2f69b7873cdfdf12566ca68bd955f0f4456e SHA-256: e98c69f93325cb4afaceb792b155d9530cea06e1b97a67cbb4c8d07a6c01d7d1
130 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9123

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-epic-mahabharata.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=the-epic-mahabharata.pdfIn PDF document text
    • http://www.mahabharataonline.com/In PDF document text
    • http://www.akramkhancompany.net/productions/until-the-lions/In PDF document text
    • http://www.fsmitha.com/h1/ch05d-ind.htmIn PDF document text
    • http://www.epicchannel.com/In PDF document text
    • http://www.thehindugods.com/In PDF document text
    • http://www.mythfolklore.net/india/orientation/content_2.htmIn PDF document text
    • http://ritsin.com/eighteen-days-in-mahabharata-war-killing.html/In PDF document text
    • http://www.hinduwisdom.info/Hindu_Scriptures.htmIn PDF document text
    • http://ritsin.com/seven-unknown-facts-about-mahabharat-indian-mythology-story.html/In PDF document text
    • http://www.vahini.org/downloads/familytree.htmlIn PDF document text
    • http://riverside-resort.net/1/term-3-grade-11-life-sciences-chapters.pdfIn PDF document text
    • http://riverside-resort.net/1/the-fourth-gospel-essays-and-exegetical-notes-on-selected-passages.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-cdp-cx681-cd-players-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/sony-blu-ray-player-bdp-s480-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/the-politically-incorrect-guide-to-american-history-thomas-e-woods-jr.pdfIn PDF document text
    • http://riverside-resort.net/1/the-grade-9-ieb-maths-question-paper-2018.pdfIn PDF document text
    • http://riverside-resort.net/1/toyota-land-cruiser-ignition-wiring-diagram.pdfIn PDF document text
    • http://riverside-resort.net/1/short-story-passages-for-third-grade.pdfIn PDF document text
    • http://riverside-resort.net/1/the-growing-child.pdfIn PDF document text
    • http://riverside-resort.net/1/the-nature-of-man.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/MahabharataIn PDF document text
    • https://www.britannica.com/topic/MahabharataIn PDF document text
    • https://www.ancient.eu/Mahabharata/In PDF document text
    • http://larryavisbrown.homestead.com/files/xeno.mahabsynop.htmIn PDF document text
    • https://en.wikipedia.org/wiki/Indian_epic_poetryIn PDF document text
    • http://www.sacred-texts.com/hin/m01/index.htmIn PDF document text
    • http://www.pbs.org/thestoryofindia/gallery/photos/10.htmlIn PDF document text
    • https://www.britannica.com/topic/Aqhat-EpicIn 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_off00004297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4297 11000 bytes
SHA-256: 686fb7f37b90a03da83086896332807accb3911aac214c8e2bd6239d40283767
font_01_sfnt_off00006550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6550 6540 bytes
SHA-256: ccf2ad871a1c455b0627227a1121d162783cfd5c5cc0974922717a09b422e600