Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd9a28697cce5dee…

MALICIOUS

PDF

35.2 KB Created: 2021-06-27 17:28:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c0140ee36919701df743aed58cc0f804 SHA-1: 48c2707d52ce8eb28a81cbb845feef25bebdcfd5 SHA-256: bd9a28697cce5dee01f1431bf23c0e32bfee850d5cad31e0513130fb9dc5e5b6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary link, http://netcdn.co/app/431946152/cheat-roblox-money-jailbreak-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to trick users into downloading potentially harmful content. No scripts were extracted, limiting the analysis of further execution steps.

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.co/app/431946152/cheat-roblox-money-jailbreak-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-thumbnail_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-coin-master-november-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-phantom-force-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-gg-com_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cheat-teleportation-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/4-step-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-spins-android_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/minecraft-for-free-games_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-para-conseguir-dientes-gratis-en-sharkbite-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/nopde-engine-64-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-dungeon-quest-free-stats-reset_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_off00003009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3009 22648 bytes
SHA-256: c29eb77f844d11fa83b2477690695c13501a2faa61e821e2c49f97b6704ccc6f
font_01_sfnt_off000062e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62E9 19588 bytes
SHA-256: be71406f1b1f603ae21596cf32a6cc02429d8f26a8995a9475e61bd95853ad02

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