Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a128ab92209233a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-05 11:16:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 96976ef813d41a54592d3d2cec14e718 SHA-1: 8cc288a0231f63d3274b1454f2a8e39752b5d137 SHA-256: 4a128ab92209233aa69c62e4aa90b6fb371e03830c03fa4ad2c1c2cd0154fe33
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a 'Free Robux Hack 2021' to entice users. It contains multiple embedded URLs that point to known malicious redirector infrastructure, ultimately leading to pages offering game hacks or generators. The document's primary function is to redirect users to potentially harmful websites, likely for further exploitation or credential harvesting.

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/free-robux-hack-2021-game-hack In PDF document text
    • http://perpus.ar-rum.ac.id/repository/pastebin-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-green-dawing-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-youtube-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-candy-van-mesh-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-roblox-promo-codes-2021-june_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-hack-roblox-with-edit-this-cookie_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/cheat-roblox-pc-speed-run-4_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/roblox-hack-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id//repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/free-tiktok-bots_GM835599320.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/how-to-get-free-robux-2021-easy-nov_GM431946152.pdfIn PDF document text
    • http://perpus.ar-rum.ac.id/repository/2021-free-robux-on-roblox_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_off000030ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FF 22476 bytes
SHA-256: f927a96dc605615b3a4791af797f8b7c91b73c089ea68b5b863847c271dc7749
font_01_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 19288 bytes
SHA-256: f0e75447e64b5aff6e0a409bd439ae7070421d1013f4950abf0614a44f9f6dfe

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