Malicious PDF — malware analysis report

Static analysis result for SHA-256 327935f30b146fc3…

MALICIOUS

PDF

42.3 KB Created: 2021-06-11 01:41:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 471f7ad32eb8454461de3e558f7e9aeb SHA-1: c4a49495e0e3301c9e8b24a77b1358b1fc34dc6a SHA-256: 327935f30b146fc38f156be88109655e7b87ad5527a49c74588170f19a604ebb
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 0.9874

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 https://netcdn.tw/app/431946152/hack-runner-roblox-game-hack PDF link annotation
    • https://www.gymun.cz/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-roblox-gift-card-codes-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/coin-master-free-spins-link-download-ios_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-get-free-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-hack-someones-robux-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/minecraft-handbook_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-adopt-me-free-pets_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gymun.cz/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-roblox-money-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-800-robux_GM431946152.pdfIn PDF document text
    • https://www.gymun.cz/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA0 24020 bytes
SHA-256: 62b957cde4fb62c7b2d3d5bb545c0f0aa55c12638cbbe74cbe0b10bf8767a15c
font_01_sfnt_off00008263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8263 18320 bytes
SHA-256: bb8b7eb1b038b0af0f3b851d9949a77a6aeab3740f3b5c28132d83ce73922320