Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f6d9f91c86820d7…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 11:43:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8a60706479fdaa5640ab1f52d4f5bb26 SHA-1: 4941148d07598c16be05bd7f600f1a35f06882ae SHA-256: 9f6d9f91c86820d771727e17768490f89e6f8a59bf79787e362058e963177834
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on luring users with promises of free game currency or hacks for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates that these links lead to malicious redirectors or scam pages. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

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/how-to-get-animation-pack-for-free-robux-game-hack PDF link annotation
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-send-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-no-verifying_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-hack-on-roblox-rap-battles-2021_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/roblox-robux-hack-apk-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/rodny-roblox-free-fire_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://sdn4-wates.sch.id/akasia/repository/daily-coin-master-free-spin-link_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_off00003056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3056 22908 bytes
SHA-256: 92e95ce659f92bf0cd036ded3dde24c244bf66d22190499f061cc681a45b6e79
font_01_sfnt_off000063b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B6 19688 bytes
SHA-256: 2d82643b80ed6bfe1b5fe5627226b7c1be905be57e4e10492ee46583eaccf860

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