Malicious PDF — malware analysis report

Static analysis result for SHA-256 65804957a7a2525e…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 02:01:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 736faa3424339ec49acc141088233009 SHA-1: 0a0c5c36e448dbb7b38e87e048b6a35e94226be7 SHA-256: 65804957a7a2525e45f91223961c7c6dc437f8b1c0ac9bae8902a0cd291f3cc6
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and 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 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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://netcdn.tw/app/406889139/coin-master-daily-rewards-game-hack PDF link annotation
    • http://www.donjastubica.hr/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/get-robux-now_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-coins-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/robux-hack-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-minecraft-bedrock-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-roblox-advertisement_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/roblox-six-pack-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/hacked-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/test-all-roblox-gear-hats-and-shirts-free_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/lifting-simulator-roblox-new-hack_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-monte_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn 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
stream_002_off0000321c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x321C 22936 bytes
SHA-256: c9758df6791876e571a1e5b886bfaea4fd416ba08cf6ad4a78d76d8451e763de
font_01_sfnt_off00006598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6598 18592 bytes
SHA-256: b7c712f3d51e99dce86b9674f13da5830ff56d4c2df7ba89fc00be2805b7d194

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