Malicious PDF — malware analysis report

Static analysis result for SHA-256 6441687456ec185a…

MALICIOUS

PDF

30.7 KB Created: 2018-06-11 08:16:51 -04:00 Authoring application: wkhtmltopdf 0.12.4 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f56fb5536491653a919abd498caa19cb SHA-1: 13740f7ee9230f8e59d97e0db64806fb88f9ab07 SHA-256: 6441687456ec185ab7062bf158aa0aafb7282ce83f1a08756607931e620a645f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9593

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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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=tecumseh-8hp-motor-manual-mtd-snowblower.pdf PDF link annotation
    • http://uncpbisdegree.com/download4.php?q=tecumseh-8hp-motor-manual-mtd-snowblower.pdfIn PDF document text
    • https://gilsonsnowblowers.com/snowfaq.htmlIn PDF document text
    • http://www.adeptr.com/L&G_arc.htmIn PDF document text
    • http://schapansky.com/AuctionPages/april2018.htmlIn PDF document text
    • https://movingsnow.com/2016/buying-a-new-snow-blower-faqs-read-this-for-the-truth/In PDF document text
    • https://movingsnow.com/category/what-you-need-to-know/choosing-the-best/In PDF document text
    • https://movingsnow.com/category/what-you-need-to-know/choosing-the-best/single-stage-2-stage/In PDF document text
    • https://movingsnow.com/2017/twenty-best-snow-blowers-september-2017-snow-blower-best/In PDF document text
    • https://movingsnow.com/category/2017-2018-snow-season/In PDF document text
    • http://riverside-resort.net/1/svp-dv-6306-camcorders-owners-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/the-aces-of-fighting-17-vf-17-apos-s-top-guns-in-world-war-ii.pdfIn PDF document text
    • http://riverside-resort.net/1/the-barbarization-of-warfare.pdfIn PDF document text
    • http://riverside-resort.net/1/the-reign-of-elizabeth-i-court-and-culture-in-the-last-decade.pdfIn PDF document text
    • http://riverside-resort.net/1/toyota-7k-engine-service-manual.pdfIn PDF document text
    • http://riverside-resort.net/1/son-of-stone-barrington-21-stuart-woods.pdfIn PDF document text
    • http://riverside-resort.net/1/tough-calls-nhl-referees-and-linesmen-tell-their-story.pdfIn PDF document text
    • http://riverside-resort.net/1/solution-of-neamen-semiconductor-physics-and-devices.pdfIn PDF document text
    • http://riverside-resort.net/1/thank-you-card-design-inspiration.pdfIn PDF document text
    • http://riverside-resort.net/1/the-vaccinator.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.kijiji.ca/b-ontario/tecumseh-engine-for-sale/k0l9004In PDF document text
    • https://www.kijiji.ca/h-ontario/9004In PDF document text
    • https://www.kijiji.ca/b-ontario/sears-tractor/k0l9004In PDF document text
    • http://blog.briggsandstratton.com/4-common-small-engine-problems-fix/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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003c79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C79 10304 bytes
SHA-256: 2a75857b7e138f36dc92404467851c805f78713097196c9a7aa9e0697eb96bb3
font_01_sfnt_off00005d45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D45 7428 bytes
SHA-256: 4b11168b93f2d0d8177f0501e5e3afacca377d5653e614219c52b6697338f9d1

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