Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d9dfd5bc10f1063…

MALICIOUS

PDF

34.0 KB Created: 2018-06-11 08:09:52 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: 04a9dd25f7317305a5c7f278ca6f1a9a SHA-1: e050c2b2ce61bb621bd8e28ee017db192fa7c986 SHA-256: 3d9dfd5bc10f1063dbd2362c5fecfadb879f0bfa5d72bfc0fd736221e75c8924
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded URLs that point to download scripts disguised as service manuals. The ML classifier strongly indicates malicious intent, and the presence of a download button lure reinforces this. The primary attack vector appears to be tricking the user into downloading a secondary payload from the provided URLs.

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=service-manual-for-mazda-tribute.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=service-manual-for-mazda-tribute.pdfIn PDF document text
    • http://www.thecruisecontrolstore.com/mazda/In PDF document text
    • http://www.drivetrain.com/parts_catalog/manual_transmission_overhaul_kits/mazda_truck_overhaul_kits.htmlIn PDF document text
    • https://www.samarins.com/maintenance/manual.htmlIn PDF document text
    • https://www.samarins.com/maintenance/In PDF document text
    • http://www.instructionmanual.net.au/holden-service-manuals/In PDF document text
    • http://www.partzine.com/free-download-nissan-terrano-2-r20-service-manual/In PDF document text
    • http://customercarecontacts.com/contact-of-mazda-cars-customer-service/In PDF document text
    • http://www.contactcustomerservicenow.com/contact-mazda-customer-service/In PDF document text
    • https://wearebss.com/In PDF document text
    • http://uncpbisdegree.com/1/swiss-legend-10057-22s-watches-owners-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solution-manual-in-segment-reporting.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sony-xs-v160hp-speakers-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/when-did-georgia-became-a-state.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-bossy-gallito-el-gallo-de-bodas-a-traditional-cuban-folktale-dual-language-edition.pdfIn PDF document text
    • http://uncpbisdegree.com/1/t-mobile-samsung-galaxy-s-blaze-manual.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-holy-geeta.pdfIn PDF document text
    • http://uncpbisdegree.com/1/targate-2018-hsc-board-question-paper.pdfIn PDF document text
    • http://riverside-resort.net/1/wisden-cricketers-almanack-australia-2001-2002-wisden.pdfIn PDF document text
    • http://uncpbisdegree.com/1/servant-the-kindred.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.motortrend.com/cars/mazda/tribute/2008/In PDF document text
    • http://www.motortrend.com/cars/In PDF document text
    • http://www.motortrend.com/cars/mazda/In PDF document text
    • http://www.motortrend.com/cars/mazda/tribute/In PDF document text
    • https://www.cargurus.com/Cars/l-Used-Mazda-Tribute-d228In PDF document text
    • https://www.cargurus.com/Cars/forsaleIn PDF document text
    • https://www.manualslib.com/manual/801405/Mazda-2006-Rx-8.htmlIn PDF document text
    • https://www.manualslib.com/brand/mazda/In PDF document text
    • https://www.manualslib.com/brand/mazda/automobile.htmlIn PDF document text
    • https://www.manualslib.com/products/Mazda-2006-Rx-8-1934362.htmlIn PDF document text
    • https://en.wikipedia.org/wiki/MazdaIn PDF document text
    • https://en.wikipedia.org/wiki/Mazda_626In PDF document text
    • https://www.carid.com/mazda-accessories/In PDF document text
    • https://www.carid.com/shop-by-product/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_off000048b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48B4 10568 bytes
SHA-256: 0952948d38d55feccfd07212d25f51dd7b86fb8fb41e78f7f2d24200eeb6edbc
font_01_sfnt_off00006a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A44 7056 bytes
SHA-256: e664587802675741c3b2d06a1157ac86da755156591078af6e3b5a63417c3846