Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1137c851fa852c9…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 22:22:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5206a45c694958ecea6dbd6fdad40abd SHA-1: 976208030d61a7a1d08b41deefd6bbb2aa058353 SHA-256: d1137c851fa852c9a10e4a0ea5ab3d07c73dd575ce314ea485774097f2f5200a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.co/app/431946152/free-account-giveaway-roblox-game-hack PDF link annotation
    • http://lib.smklabor.sch.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/citizen-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-pc_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hacks-for-roblox-admin_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-parking-in-back-sign-id-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/counter-blox-roblox-offensive-hacks-2021-download_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/tp-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-games-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-coins-twitter_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-free-adidas-shirt_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-generator-secret_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-how-to-get-any-gamepass-free-not-patched_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/be-my-bad-break-free-mashup-roblox-id_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000323f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323F 22084 bytes
SHA-256: acdab8c32e9e3920587f0fae8113ca21e9d4126f18d927508cb64f33ee144f91
font_01_sfnt_off000062f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F6 19472 bytes
SHA-256: 70eee49409ac1735f2e8f7b9654b38bfe8985844b7e4a0691346f8805d5943bb

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