Malicious PDF — malware analysis report

Static analysis result for SHA-256 9231f9c7b7e74381…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 00:43:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 3d7ed8726e9f5b3729d319f047444c34 SHA-1: 0971f91e28ca7cdc9bfa5e0b4d84baf2b437765a SHA-256: 9231f9c7b7e7438183d9de60c2e708f93601432aed55a5fa7e38794a0f7373e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector leading to a 'game hack' download. The document body and heuristics indicate a lure for game exploits or cheats, aiming to trick users into downloading potentially malicious software. The presence of numerous similar URLs reinforces the phishing and redirection attempt.

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.tw/app/479516143/wurst-download-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/project-alpha-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/como-descargar-hacks-para-roblox-red-boy_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-roblox-exploits_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/the-conquerors-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/abstract-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-cafe-groups-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-116-free_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hacks-roblox-gamepas_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/real-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/tiktok-free-upload_GM835599320.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-jailbreak-hack-gui_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_off0000313a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x313A 21816 bytes
SHA-256: 71198649860c00422d4fe8092c5f500fa477b2416dcbd1be39337292e57c19d4
font_01_sfnt_off0000611e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611E 18796 bytes
SHA-256: 41b057bebeefa6dc0e0c7cd8e7e537373d3987302916cf05e2be674a8495b48b

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