Malicious PDF — malware analysis report

Static analysis result for SHA-256 b30f99a33bf469dd…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 06:06:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1143dfe47d7218a56df9083025ef79ce SHA-1: 5f4d0b4a684640df628832650beef832f60b3294 SHA-256: b30f99a33bf469ddb01195f2b44e9d78140f7027a48b9ea560ca0ba4068d36c3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'free generators' and 'game hacks' for Roblox. The primary redirect URL, http://netcdn.tw/app/431946152/roblox-download-game-hack, is designed to lure users into downloading potentially malicious files or visiting further compromised sites. The presence of a visual download button further supports the deceptive nature of the document.

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/431946152/roblox-download-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-body-parts_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/omg-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-fre-codes_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-paintball-level-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robloxlover69-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/v3rmillion-free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-i-hack-robux-by-myself_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-hack-code-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-stuff-on-roblox-catalog-mobile_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00003037.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3037 22580 bytes
SHA-256: 68a91530a79097e45c8d617cba4a950b38d386d24ee5626e5dda708e895c8a64
font_01_sfnt_off00006297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6297 18992 bytes
SHA-256: 42498b2248152e2d1ea08a4c56450afe296108018df271c09413f6b867f34853

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