Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a43fc507a120a6…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 11:48:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: eca88d8dcc39fda87621502e47642b3a SHA-1: f8dd1cfabecb8dbb2608ec1fc6a2c007aa319506 SHA-256: b5a43fc507a120a62237082e75898b642c96e964bbd879590658eb47bdc095f7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, with a primary lure of 'free draw roblox game hack'. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the links. The document likely serves as a lure to download further malicious content or lead to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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-draw-roblox-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hacked-hat-roblox-t-shirt_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-sexually_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-promo-codes-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/pokemon-go-free-friends_GM1094591345.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-aidain_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-robux-no-hack-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-free-download-iphone_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-spin-hack-coin-master-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_off00002eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEF 22672 bytes
SHA-256: a7f50f1780564735ba682aa7c5356b8790b8412bbf66110aa6eeb9ecbff19bc6
font_01_sfnt_off00006194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6194 18984 bytes
SHA-256: c9a437ed21f5727825c8f5bb4a2a9a84ae98f08afb2ff34fcd41a5b5e7b26fbd

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