Malicious PDF — malware analysis report

Static analysis result for SHA-256 49d1257120439e2b…

MALICIOUS

PDF

36.1 KB Created: 2021-06-30 20:49:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0c1478ec608ab0f86c9a8f96afd010c2 SHA-1: 992384b5ecbe09dab522c76dfe14aaf66f5fe415 SHA-256: 49d1257120439e2bd5af7d0fab24b69c40dbb9e8319b242ef5699949bae84904
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector, masquerading as a generator for free game currency (Robux). The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lure users to malicious infrastructure. No scripts were extracted, but the presence of malicious links and the lure indicate a high likelihood of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/roblox-robux-hack-cheats-generator-free-robux-and-tix-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-whatsapp-link_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/cheapest-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-2021-robux-no-human-verification-easy_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/www-cheatsk-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-tiktok-followers-youtube_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rich-people-that-didnt-get-hacked-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-free-spin-and-coin-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/script-executor-roblox-free_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_off0000336f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x336F 22876 bytes
SHA-256: fdcb72ba07dd85436ac51a27f5ce3a9276632621bd5375cc31638416425b140d
font_01_sfnt_off000066da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DA 19524 bytes
SHA-256: 8a97c74e2da7a344e1488edaa1593c329addeb647e3506615ca2572ec86d85b6