Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1a14ea57a27febe…

MALICIOUS

PDF

37.6 KB Created: 2021-07-04 00:47:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a46bf8e24fca6c0bfafef50fd8e5906a SHA-1: 40317184e408e39531cf1d81fd5ceb90a69c13ea SHA-256: a1a14ea57a27febe7da56fea1bfcb17f772b61cb415549d6357028a07a118d57
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a game hack redirect lure, indicating a phishing or scam attempt. The document body, though partially garbled, contains text related to 'Robux' and includes URLs that promise 'free Robux' or 'game hacks'. This suggests the document is designed to trick users into visiting malicious websites, likely to download further malware or steal credentials. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 4

  • 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 http://netcdn.tw/app/431946152/how-to-get-more-robux-game-hack PDF link annotation
    • http://elibrary.fl.unud.ac.id/repository/free-robux-desktop-generator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/info-de-jon-fue-el-hacker-de-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hack-roblox-robux-android_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-frisk-shirt-free_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/how-to-get-free-robux-and-tix-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-free-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-boombox-gear-free_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/get-20212021202120212021202100-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-roblox-giftcards-not-used-100_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/coin-master-free-spins-and-coins-blogspot_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_off00003b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3B34 22740 bytes
SHA-256: 37c8dda8784f8094cb2f12c52c739529e45d42532e6e83abfa4152e08ebbdef4
font_01_sfnt_off00006e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E32 19016 bytes
SHA-256: 6aa127ff16da2a4872f87fb8bac29a815e7536eb149385d076fe202f8a47623a

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