Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae904f899bf8f6f6…

MALICIOUS

PDF

33.8 KB Created: 2021-07-03 13:34:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b951fc35f4e5a2910f2bd12c3d393981 SHA-1: a15c527069f6efb25fde11cb556ce44266387531 SHA-256: ae904f899bf8f6f6b56023a48d5906f06efc777e5776573fe853c79a17c3fa01
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into downloading game hacks or cheats, with a primary redirector pointing to malicious infrastructure. The document body and embedded URLs strongly suggest a phishing or scam attempt related to popular online games. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely leading to further malware downloads or credential harvesting.

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.tw/app/431946152/roblox-hack-download-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/cheat-budy-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/latest-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-account-login-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/funcionando-nuevo-hack-roblox-jailbreak-phantom-forces-booga-booga_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/2021-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-hack-created-by-robuxian_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-beta-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-bee-swarm-how-to-get-free-royal-jelly_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-roblox-players-acounts_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/no-generator-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-obc-in-roblox-2021_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_off00002e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3C 21908 bytes
SHA-256: 0d515acf3edca2cbef5f8e9d88e1f32d01786dce258adba89d4c74184b0992ba
font_01_sfnt_off00005ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA2 19160 bytes
SHA-256: 20e8ef43e122870d61f5f3bdc7785651657b4c6f8223466300bbb50b4def8f00

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