Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bb4aa36c5434cb2…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 20:43:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cd8183be9a502c2a392106afb1704712 SHA-1: 9ce1d3fea58eb4a25e9abecf203bf1855d8035a3 SHA-256: 1bb4aa36c5434cb204ff6fe22c88afe84f2d75e1fed4a754f9fb2e02cb8180b3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically targeting users with lures for game hacks and free currency. The primary link, http://netcdn.co/app/431946152/how-to-get-free-1-million-robux-game-hack, is identified as a malicious redirector. The document body and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-1-million-robux-game-hack In PDF document text
    • http://lib.icbc-indonesia.org/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-parris-island-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/how-to-hack-assasssain-in-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org//repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/paint-exist-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.icbc-indonesia.org/repository/free-roblox-hack-inspect-copy-and-paste_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_off0000304a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304A 22464 bytes
SHA-256: 783a73591ca19ec85102ad3e95fa2b514bda92d0fa9a4728101e61b5b4443910
font_01_sfnt_off000062a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62A0 19480 bytes
SHA-256: f272117880ea52f18f8b9452e43d03d077d641fabe9ef28d4984d7da4472b413

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