Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5ad6096e08f9a2…

MALICIOUS

PDF

36.0 KB Created: 2021-06-25 10:00:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 14d514a3fa76a4f3cf14daf7ef6d5ed2 SHA-1: 618f623781f851a49dccea7daba587b01e2e895f SHA-256: 8c5ad6096e08f9a24cb9593e6a80eaa1b480e5bcdc84e143eaada80ca0963250
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links designed to lure users with promises of game hacks and free currency, directing them to potentially malicious redirectors and SEO link farms. The heuristic PDF_GAME_HACK_REDIRECT_LURE specifically identifies the lure of game hacks and the malicious redirector infrastructure. The presence of a visual download button further supports the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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.
  • 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/how-to-hack-roblox-on-chat-bar-game-hack In PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-mad-city-roblox-and-teleport_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/poisonous-beast-mode-free-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/a-free-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-come_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/denis-free-admin-town-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/how-to-earn-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/roblox-donload-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/hacks-to-get-free-robux-on-roblox-in-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-tiktok-accounts_GM835599320.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/free-robux-paest-bin_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/como-conseguir-fuerza-en-boxing-simulator-2-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://pustaka.widyakartika.ac.id/repository/robux-hack-no-human-verification_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_off000034a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x34A8 22688 bytes
SHA-256: 8cdabd3b4d199e0995c6c3566cb4cadb7f1f233304852df4815ed0f31740bc03
font_01_sfnt_off00006787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6787 19088 bytes
SHA-256: 29d528ce8a35515e0a7cbc3145cebac39746efa4218b80c3c951241746e13788

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