Malicious PDF — malware analysis report

Static analysis result for SHA-256 f42b7f757b4e893b…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 22:22:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9b6e392c149f92ca7f791932428f7c60 SHA-1: 9e115822a05e9a4fa0f04642fb02e451059e20ee SHA-256: f42b7f757b4e893bdddf1c0ae291ae37ce490b5a98c6ae470cda53d8e794be9f
122 Risk Score

Malware Insights

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

The PDF contains a prominent link to a 'free generator / game hack' which is a common lure for malicious downloads. The document body explicitly mentions 'Free Download Roblox Robux Hack' and includes the malicious URL. This suggests the primary goal is to trick users into downloading potentially harmful software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/free-download-roblox-robux-hack-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/arts-78-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-giveaway-access-code_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-iphone-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/code-hacks-for-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free4mobile24-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-no-password-needed_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-client-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/rexima-roblox-cheat-for-apocalypse-rising_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021_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_off00003160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3160 22396 bytes
SHA-256: c6fc604a0f3278358dc3be53695e55ded80c706000927ff85c12edcc782f3c0d
font_01_sfnt_off00006316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6316 19280 bytes
SHA-256: 2dbfbe64a2b6ab92195c02d29a323ff79a3102a16141b8673c80245784fc521d

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