Malicious PDF — malware analysis report

Static analysis result for SHA-256 208bbaaf1be9b255…

MALICIOUS

PDF

34.8 KB Created: 2021-06-29 15:35:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 953e386d855e0f196e90d2db822e7dd8 SHA-1: 2d1f12efc44a180a554eedb6322515a076aa5076 SHA-256: 208bbaaf1be9b255089f3a55937aa2c19e7822e8016791d10e2642ed8f40c3d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users into clicking on what appears to be a game hack or generator. The primary malicious link is http://netcdn.co/app/431946152/como-hackear-la-cuenta-de-tu-amigo-en-roblox-game-hack, which is designed to lead users to potentially harmful content. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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/como-hackear-la-cuenta-de-tu-amigo-en-roblox-game-hack In PDF document text
    • http://elibrary.fl.unud.ac.id/repository/fly-hack-roblox-jailbreak-download_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-pc-game-free-download_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/comment-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/hacks-de-roblox-booga-booga_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-jailbreak-hacks-mobile_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/roblox-noclip-hack-wearedevs_GM431946152.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/cheat-codes-for-zombie-apocalypse-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/pokemon-go-free-8-generation_GM1094591345.pdfIn PDF document text
    • http://www.elibrary.fl.unud.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • http://elibrary.fl.unud.ac.id/repository/free-limiteds-on-roblox_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_off00003038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3038 22176 bytes
SHA-256: 278e31ef269124e84ccb6064ff1ad90efba534e2070c3b6f619017d113436a46
font_01_sfnt_off000061b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 19448 bytes
SHA-256: 52f1bd0f0e9b241e4b0ca824e258bae8a7f5b6bf2a54ecfc684921efe63387a8

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