Malicious PDF — malware analysis report

Static analysis result for SHA-256 d37a2d7cc088ba50…

MALICIOUS

PDF

33.2 KB Created: 2018-06-11 09:31:30 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-04
MD5: 2e8824bee256c345006c3b6b40438aa6 SHA-1: 6ed0fb977dae142b660345b516fd39d1ddc7aaf1 SHA-256: d37a2d7cc088ba501df62d7bcbc916cdb6786296e46aa1d6320afc3d45f96f7a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The presence of a visual download button further supports the lure mechanism. The document body, though partially garbled, contains references to the same suspicious URLs, reinforcing the download attempt.

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=the-road-to-mccarthy-around-world-in-search-of-ireland-pete.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=the-road-to-mccarthy-around-world-in-search-of-ireland-pete.pdfIn PDF document text
    • http://www.willowandthatch.com/irish-costume-dramas-ireland/In PDF document text
    • http://www.istructe.ie/In PDF document text
    • https://www.aletterfromireland.com/the-origins-and-journey-of-your-irish-surname/In PDF document text
    • http://www.oldladywood.co.uk/where.htmIn PDF document text
    • http://www.irishabroad.com/Business/List.aspIn PDF document text
    • http://www.paddydoyle.com/a-history-of-neglect/In PDF document text
    • http://www.korda.co.uk/carpfishingnews/road-lake-round-up-jake-wildbore/In PDF document text
    • http://cat.mesalibrary.org/polaris/Search/newreleases.aspx?ListingTypeID=26&ctx=1.1033.0.0.3In PDF document text
    • http://tvseries4u.com/2016/In PDF document text
    • http://riverside-resort.net/1/wind-warrior-world-aflame-book-1.pdfIn PDF document text
    • http://riverside-resort.net/1/vocabulary-mastery-3-using-and-learning-the-academic-word-list.pdfIn PDF document text
    • http://riverside-resort.net/1/wave-basics-boundary-behavior-answer-key.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sony-dsc-s20-digital-cameras-owners-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sony-dsr-20-camcorders-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/via-afrika-grade-11-business-study-textbook-november-exemplar.pdfIn PDF document text
    • http://riverside-resort.net/1/user-guide-for-sygic-mobile-maps.pdfIn PDF document text
    • http://riverside-resort.net/1/visiting-card-background-design-in-photoshop.pdfIn PDF document text
    • http://riverside-resort.net/1/war-and-peace-in-literature.pdfIn PDF document text
    • http://uncpbisdegree.com/1/switching-theory-and-logic-design-2nd-edition.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/McCarthy_RoadIn PDF document text
    • https://en.wikipedia.org/wiki/Cormac_McCarthyIn PDF document text
    • http://www.dailymail.co.uk/sciencetech/article-1363835/Why-Guinness-tastes-better-Ireland-world.htmlIn PDF document text
    • https://www.nationalgeographic.com/travel/In PDF document text
    • http://www.blu-ray.com/movies/The-Road-Blu-ray/10483/In PDF document text
    • https://www.nationalgeographic.com/magazine/In PDF document text
    • https://abcnews.go.com/entertainmentIn PDF document text
    • https://www.telegraph.co.uk/news/In PDF document text
    • http://www.dailymail.co.uk/tvshowbiz/article-2801743/Jenny-McCarthy-talks-feeling-like-transgender-person-inside-reveals-love-son-gay.htmlIn PDF document text
    • https://www.amazon.com/movies-tv-dvd-bluray/b?node=2625373011In 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_off000047d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47D5 9964 bytes
SHA-256: 23c5c9248411c9e2c8395abafb760019ad5d3e9a7e2cfcd66c52f08a2e7d5449
font_01_sfnt_off000067a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67A2 6924 bytes
SHA-256: 6cd8dff8db2f4430cdfe6783fff3aa9e721164fe66b04b8b76dd80144f5c9814