Malicious PDF — malware analysis report

Static analysis result for SHA-256 0817d0af6f8d33d5…

MALICIOUS

PDF

46.0 KB Created: 2021-06-07 04:03:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 41aebddbdaa4ffce32b5e0b6350781a8 SHA-1: c5bdcb8d4f3b4f26b44d04a111f22c93defcba5d SHA-256: 0817d0af6f8d33d5d94abb693c08a7ee3afe705730be1c7f5ebb9fa0e6ad41bc
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a game hack generator, identified by the 'PDF_GAME_HACK_REDIRECT_LURE' heuristic. This lure is designed to trick users into visiting a potentially malicious URL, which is likely a phishing page or a download site for malware. While no scripts were directly extracted, the nature of the lure and the embedded URLs suggest an attempt to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/flood-escape-2-infinite-jump-roblox-hack-pastebin-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-pin-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-iphone-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/daily-free-spin-link-in-coin-master_GM406889139.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_off00005269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5269 25436 bytes
SHA-256: 55d8b4fe6644d9a913931fca4e31d5561884a7ef83ff27c24580db0585c27d79
font_01_sfnt_off00008d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D06 19764 bytes
SHA-256: ec69c0fe9e3b09a8e4846b1ba138dacfb5d59eac1cc92e1677bd0cb90c739b37

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