Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7bd8678a84c51ae…

MALICIOUS

PDF

33.9 KB Created: 2021-07-03 17:23:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5073149fbd643ac23bb4c0a8b018736c SHA-1: d6ccb3e8a8ea67e227d52f97d1f36378496f6a38 SHA-256: c7bd8678a84c51ae249a752283cdcd050ae25da2d7103a308b1e1c80eefb1b2c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a known malicious redirector URL. The ML classifier strongly flagged this PDF as malicious. The embedded URLs and the document body content indicate a social engineering attempt to trick users into visiting potentially harmful sites.

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-money-hack-game-hack In PDF document text
    • https://library.iuli.ac.id/repository/honey-free-roblox-robux-codes_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-roblox-hack-999999-robux-no-verification-in-pc_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/counter-blox-roblox-offensive-cheats-download_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/robux-hack-apk-2021_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-hair-on-roblox-promo-code_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-create-gui-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-hack-exploit-the-plaza-money-hack-get-10-billion_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/cheat-roblox-mod-menu_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-no-human-verification-or-survey-or-email_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/games-on-roblox-that-promise-you-free-robux_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/how-to-hack-people-on-roblox-dontneed-to-install-anything_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/download-free-robux-giver-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/roblox-speed-hack-download-free_GM431946152.pdfIn PDF document text
    • https://library.iuli.ac.id/repository/carlox-hack-de-la-sable-laser-de-goku-oscuro-roblox_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_off00002ed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED5 21912 bytes
SHA-256: 8306da08d85f7711b4c43cc354715c47c29b914e0535ebf353587bb96515bb7e
font_01_sfnt_off00005f44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F44 19032 bytes
SHA-256: 203e1121f486a9f27f7b8b1bc344d44945bd10d034850d35ac5f84883fff97b4

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