Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd55dba79c737c8…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 20:10:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 746636f6d7e0066cb5842122525843c9 SHA-1: abd975dc23fa10016d2e36a4567d239b0c45ef3b SHA-256: 2bd55dba79c737c824ab26a8ce7d4cb72b4ae9871252b0492f8dade6f9ea75ef
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 0.9980

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 http://netcdn.tw/app/479516143/minecraft-free-online-games-game-hack PDF link annotation
    • https://stmik-kharisma.ac.id/perpustakaan/repository/big-brother-roblox-exploits-free_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/coin-master-free-spin-app-reviews_GM406889139.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/what-is-the-best-looking-thing-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-its-free-2021_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/link-coin-master_GM406889139.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-get-free-money-on-the-plaza-roblox_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-hack-no-download-or-surveys_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-hack-the-legendary-swords-rpg-roblox_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/how-to-hack-a-youtuber-on-roblox_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/free-robux-gift-card-codes-not-used_GM431946152.pdfIn PDF document text
    • https://stmik-kharisma.ac.id/perpustakaan/repository/coin-master-free-spins-link-today-new_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_off000032af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32AF 22712 bytes
SHA-256: 865b1b7d672c5b66d29ba6b942e7cbd78541a803d7e160704ceb1c679a8a966b
font_01_sfnt_off000065a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A1 18192 bytes
SHA-256: dd259a8a226edfb7beeeab1f7d1930cd74b5ac39a7352f8f4b1a77a7129da92e

Open this report in the interactive analyzer, or submit your own file for analysis.