Malicious PDF — malware analysis report

Static analysis result for SHA-256 47ec47df935b1d19…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 15:45:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: d5b4b07d96fb5a8142adc6f3a42b3211 SHA-1: 0e9f0fe3f2ec1a9e602d6695fc4e18e7da1ccee1 SHA-256: 47ec47df935b1d19433ff7cf1e95125cbbdfd9b63742378f67347eeb1db86b58
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious URL, disguised as a "Roblox Hack Slurp" generator. The heuristic firings indicate that this is a malicious redirector designed to lure users into clicking on links that lead to potentially harmful content. While no scripts were explicitly extracted, the nature of the PDF and the embedded URLs strongly suggest an attempt to deliver a malicious payload or phish for user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-hack-slurp-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/elysium-bros-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/games-for-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-spins-reddit_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/pokemon-go-mod-apk-joystick-free-download_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-free-download-pc_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
stream_004_off00005134.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5134 26120 bytes
SHA-256: 988c3baaeece9de0c7e5cdb49c4e5e473e526ea3f2a5c47a4a064ee2b64277ff
font_01_sfnt_off00008d16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D16 18500 bytes
SHA-256: 9337cfa1cd65f5b5ef68372ced13266698720debeeee6ee84265a29d25f6f21a

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