Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb140a8c514098a…

MALICIOUS

PDF

32.6 KB Created: 2021-06-20 06:19:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2f4ad2b010a0257b6b4256ec48a3740b SHA-1: bd6429eeb3ecfb3eeadcaa5c1fd074903c61d2a5 SHA-256: 9fb140a8c514098aafd62307393e7ec8d2c09357a1bd6d658539b16c60954b88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, including a known malicious redirector at http://netcdn.co/app/431946152/comment-hacker-sur-roblox-game-hack. The document body and embedded links suggest a lure for game-related cheats and hacks, aiming to trick users into visiting these malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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.co/app/431946152/comment-hacker-sur-roblox-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/play-games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-apk-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/anime-tycoon-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-hacks-for-phone_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hot-to-hack-roblox-on-mac_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/spins-gratis-coin-master-hoy_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-no-human-verification-generator_GM431946152.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_off00002aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABA 21668 bytes
SHA-256: 515c52fb5d972511755bdc9a6802c411a00414c130f3c32cc9cdee7f1e829e04
font_01_sfnt_off00005a30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A30 19160 bytes
SHA-256: 7d5566ad1b65da016e6d517793f12f182eb52c96fec1bda2affe682b04ca3158