Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cc472fea09eb610…

MALICIOUS

PDF

48.5 KB Created: 2021-06-09 14:03:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8f9373aeb9135f005ef066b86d1c1243 SHA-1: d2117a065a2b09ad7313128c45f0a511e58b518e SHA-256: 8cc472fea09eb6103b7a665caf8d3b3dfd9db580b88b5de8e8751d85ef503cc0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are presented as game hacks or generators, indicating a lure for potentially malicious content. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of these links are present, and the 'PDF_GAME_HACK_REDIRECT_LURE' specifically identifies the nature of the lure. While no scripts were extracted, the embedded URLs are the primary indicators of malicious intent, likely leading to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/431946152/island-royale-roblox-hacks-2021-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/hack-on-roblox-to-get-money-for-blox-burg_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/elemental-battlegrounds-roblox-shard-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-clipart-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/tiktok-free-like-bot_GM835599320.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/when-you-you-download-roblox-is-it-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-jailbreak-cheat-codes-and-hacks-for-samsung_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52BD 26192 bytes
SHA-256: 901b58fd6ba422e2ebac651ac0854cf9cc48f4b25f75964b6c982bb7f8c00d47
font_01_sfnt_off00008e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E61 2908 bytes
SHA-256: e28d2c57f35643e2026f86c34ac3bb63cba74be3f6c066e81aba6d285e5a121b
font_02_sfnt_off0000985b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x985B 18936 bytes
SHA-256: ca6b834ce67c5eb8173025789a5da5f51eaf7bbba80ed1cac38bd1988af86189

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