Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cf6a36d0e86b9f2…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 08:56:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1c88b540e73a6935e8e9cb1af05d67b3 SHA-1: 1d758af07ca9d92cea0ae326df60d3a230e913fe SHA-256: 6cf6a36d0e86b9f2ff8bd521a86f761ff1d29fd3e03eb94e373367e6f0d684e2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, masquerading as game hacks and generators. The primary lure URL is http://netcdn.co/app/431946152/como-hackear-dragon-ball-rage-roblox-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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/como-hackear-dragon-ball-rage-roblox-2021-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-draw-2-script_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/cheats-for-roblox-vehicle-simulator_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-para-roblox-reign-teleports-666-y-mas-tutorial_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-roblox-usernames-and-passwords-not-changeable_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-girl_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hack-roblox-mod-apk-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/pokemon-go-free-and-home-transfer_GM1094591345.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-redeem-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/bux-life-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-for-windows_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-roblox-on-chat-bar_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/good-hacks-free-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-hack-download-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_off00002fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA9 22884 bytes
SHA-256: a472a362436f295028f2c28fb7035a68e7574de6e74466fc24bb69952bb5f2dc
font_01_sfnt_off000062e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E5 19484 bytes
SHA-256: e2f4b57f31f22f06c0f3999d58f35ea46d305fa19cd8107dfdfdf9b6c6140693

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