Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b0e3b44f1458da…

MALICIOUS

PDF

30.8 KB Created: 2018-06-11 09:06:45 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2020-09-24
MD5: d2fd43bed029ea9943c60fd75bf462af SHA-1: 68010082f85a986ac00d71354342e596bdd2ecaf SHA-256: 30b0e3b44f1458da805e738ea760215490e6575610dd84cc558c0ba70150756d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded URLs that point to a domain commonly associated with malware distribution. The ML classifier strongly flagged this PDF as malicious. The document body and heuristics suggest a lure to download a file, likely a malicious payload, disguised as a service manual. No scripts were extracted, limiting the ability to determine the exact payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9515

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=toyota-1kr-fe-service-manual.pdf In PDF document text
    • http://uncpbisdegree.com/download4.php?q=toyota-1kr-fe-service-manual.pdfIn PDF document text
    • http://www.toyota-tech.eu/MaintenanceSchedules/yaris/Final.pdfIn PDF document text
    • http://www.dee-ltd.co.uk/In PDF document text
    • http://www.toyota-club.net/files/faq/03-08-16_engine_eng.htmIn PDF document text
    • http://www.recursosticmestre.com/m/m/maintenance-manual-peugeot-107.pdfIn PDF document text
    • http://www.toyota-tech.eu/MaintenanceSchedules/aygo/Final.pdfIn PDF document text
    • http://www.oldclassiccar.co.uk/modernads_make/toyota.htmIn PDF document text
    • https://www.buyacar.co.uk/toyota_aygo_hatchback/deal_1_0_vvt-i_x-play_5dr_1685707.jhtmlIn PDF document text
    • http://www.distrimotor.com/In PDF document text
    • http://uncpbisdegree.com/1/the-immortal.pdfIn PDF document text
    • http://uncpbisdegree.com/1/suzuki-quadrunner-350.pdfIn PDF document text
    • http://uncpbisdegree.com/1/sol-y-viento-answer-key.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-enigmatic-body-essays-on-the-arts.pdfIn PDF document text
    • http://uncpbisdegree.com/1/solution-manual-to-vector-and-tensor-analysis.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-best-garden-doctor.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-facebook-effect-inside-story-of-company-that-is-connecting-world-david-kirkpatrick.pdfIn PDF document text
    • http://uncpbisdegree.com/1/the-best-book-of-sharks.pdfIn PDF document text
    • http://riverside-resort.net/1/vaughan-mammalogy-5th-edition.pdfIn PDF document text
    • http://uncpbisdegree.com/1/student-solutions-guide-for-zumdahl.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/Toyota_VitzIn PDF document text
    • https://www.gumtree.co.za/s-toyota+3zz+engine/v1q0p1In PDF document text
    • https://www.gumtree.co.za/s-western-cape/toyota+runx/v1l3100001q0p1In PDF document text
    • https://www.sbtjapan.com/used-cars/toyota/In PDF document text
    • https://www.sbtjapan.com/used-cars/honda/In PDF document text
    • http://www.microsofttranslator.com/bv.aspx?ref=SERP&br=ro&mkt=en-US&dl=en&lp=FR_EN&a=http%3a%2f%2fwww.distrimotor.com%2fIn 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_off00003d7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D7A 10416 bytes
SHA-256: 284862d72238a9e3c70f66ef5e04777263b6f7807ceeac122d7ae96e4d272e3f
font_01_sfnt_off00005e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E7E 6968 bytes
SHA-256: 0892f3cdcf2206df6836546746adcf48c34548586e5de1988764f45c5726e9fc