Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b128dc357a0db9a…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 06:08:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d2f1de0839dc414c14eb3e7adf9651d1 SHA-1: 81eeb439321b5837c3da911bfef4c552d378f57c SHA-256: 1b128dc357a0db9afec3e26a32c5cb19723a2ced2b7fed202ea3ae5d9d0ae205
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a game hack lure to entice users to click on embedded URLs. The primary URL, http://netcdn.tw/app/431946152/how-to-hack-a-roblox-account-easy-game-hack, is associated with a high-risk redirector. The document's structure and embedded links strongly suggest it is designed to lead users to malicious websites for credential harvesting or malware downloads. No scripts were extracted, but the PDF's nature points towards social engineering.

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/431946152/how-to-hack-a-roblox-account-easy-game-hack PDF link annotation
    • http://elibrary.perludem.org//repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/magitan-hack-keeps-crashing-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hack-robux-belen_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-email-rewards_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-pc-hack-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-play-minion-free-tag-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-minecraft-bedrock-edition-on-pc-for-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-groups-popular_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-working-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/execute-scripts-notmallyso-sorunu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-roblox-jailbreak-mobile_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-app-download-robux-genurater_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-ps3-free-download_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-time-hack-ios_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_off000031a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A1 22340 bytes
SHA-256: 651cec76620dceeaf0c0e2d1e199f25ad6ca74f083bacf5671007c8b9decde71
font_01_sfnt_off00006306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6306 19244 bytes
SHA-256: 4dcbe17bebf2382ad99832b5327dd7065748ff6dacf6eb853322815bf961736f

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