Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9a2e95188aaf598…

MALICIOUS

PDF

32.8 KB Created: 2021-07-03 16:36:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2574230238dd69d6afa1844348abae2d SHA-1: 93fc418b4257061a0d5e475e5366807a63019485 SHA-256: e9a2e95188aaf5985688c434a96d88c978465c4f018276438f206184c5371cae
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free currency. The primary malicious URL identified is http://netcdn.tw/app/431946152/get-more-robux-game-hack, which is likely used to deliver a second-stage payload or lead to a phishing site. The document body and embedded links strongly suggest a social engineering tactic to trick users into visiting malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/get-more-robux-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/cheat-engine-62-roblox-mac_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-cheat-engine-table-and-bypass-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-hack-just-username_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-jeans-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-shower-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-bis_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/static-moonactive-net-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/robux-script-hack-2021-suffi-de-s-abonner-plus-script_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/redline-32-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-script-injector-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-space-miners-hack_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_off00002a4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4B 22264 bytes
SHA-256: 033bf04b6102b149c9b9816862573269c7f517b635fe0e41f322aa45db72a117
font_01_sfnt_off00005bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BDC 18852 bytes
SHA-256: b803333033a1d948a3e2070f5da6cc90ff41f413c00fb3b83224e61e6ba756dc

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