Malicious PDF — malware analysis report

Static analysis result for SHA-256 5355ddd0c9d2c662…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 12:46:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 35a2511bd32d353eba88ffbb48f74352 SHA-1: fd45e5630f81d6f21978483ee5852a9732d8d854 SHA-256: 5355ddd0c9d2c662250d3bf93d8dadad84ac4b4044f4789cca45001117fa0d8c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at 'https://netcdn.online/app/431946152/free-roblox-pin-codes-game-hack'. This link is presented as a lure for game hacks or generators. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/free-roblox-pin-codes-game-hack In PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-images_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/spin-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.uinbanten.ac.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.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_off0000506f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x506F 31856 bytes
SHA-256: b7888f91360769bc4618fde3abaf39e8efbe4f3357a087ba62ba4e3cf89438dc
font_01_sfnt_off0000964f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x964F 18396 bytes
SHA-256: f52dc14ee7e448aa0f674abe902bf1c93ecce416da154576fb4a0807dea580f0

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