Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f3c8b2e7ec70fa…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 12:49:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 61ccddec8a37cb07894cfba6cbd82340 SHA-1: 27b4a54893f4ef39b6e572f9f6048f24a89be2aa SHA-256: 94f3c8b2e7ec70fa315d5e90043d602c51fc5a4787c8747aad774d930fbdaa34
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9804

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.online/app/406889139/coin-master-free-attack-link-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-link-facebook-page_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-brickbattle-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/clean-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-shield-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004c9d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C9D 23768 bytes
SHA-256: 26334f32ae9bfada8f84a8950a1278238326e8b57135bea99bc8b9cf9691624c
font_01_sfnt_off0000823d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823D 2840 bytes
SHA-256: 30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37
font_02_sfnt_off00008bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF0 17880 bytes
SHA-256: 96402d2e96280801386aa337121127c59561cdc8f458ec32dbe1421b57db916e

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