Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd57b1d4e507f05…

MALICIOUS

PDF

45.2 KB Created: 2021-06-04 04:32:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: af65508302ca277c723531668616fe2c SHA-1: 9266617d9740fe575ad96152f149aa779139db58 SHA-256: bbd57b1d4e507f054c0017b61338089011f366b787193b79ad126e351e400d7b
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 0.9864

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 https://netcdn.online/app/431946152/roblox-robux-online-hack-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/free-star-codes-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-coins-on-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-skins-ps4_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/master-game_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-kid-friendly-no-human-verification_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_off00004fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FAD 28480 bytes
SHA-256: 0417695ae33b334254615fb51b0f72bc53a7601c3e74075c4b5b275398193e1b
font_01_sfnt_off00008dba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DBA 18444 bytes
SHA-256: 09198f44a053015cf2cbf9147101f57ae68b93378498af6514746816e9c65d5c

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