Malicious PDF — malware analysis report

Static analysis result for SHA-256 461972e4cae0b3cb…

MALICIOUS

PDF

36.5 KB Created: 2021-06-29 09:35:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 55ced452475cae03c5825dc832481db8 SHA-1: 49e6f450349fd6b41e0d44210847f5e2f3ebe224 SHA-256: 461972e4cae0b3cb181aacd541b9f4b323d76f8b79b3c3c4baa32e862f186217
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering 'free coins' or 'game hacks' for Roblox, disguised as a lure for free in-game currency. One of the primary links, http://netcdn.co/app/431946152/how-to-get-free-coins-in-assassin-roblox-2021-game-hack, is flagged as a malicious redirector. The presence of numerous similar links suggests a phishing or scam campaign aimed at users seeking in-game advantages. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a social engineering attack.

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/how-to-get-free-coins-in-assassin-roblox-2021-game-hack In PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-roblox-accounts-2021-february_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-roblox-accounts-with-robux-and-bc_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-no-verification-no-credit-card-no-surveys_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/get-free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-no-more_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox-cheats-proxy_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/colossus-legends-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/hack-de-roblox-robux-infinitas-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/descargar-hack-de-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/emperor-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-jeux-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/pastebin-hack-robux-1-oct_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/roblox-free-boombox-script-site-v3rmillionnet_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/cheat-strucid-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-roblox-wwwgeneratoronlineinfo-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.industri.ft.unand.ac.id/repository/free-robux-generator-no-human-verification-no-survey-or-offers_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000036ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36AC 22428 bytes
SHA-256: 193d0f3776a308bc3626f63cdfff397c2e70c76c503ce09142318fcc735c1774
font_01_sfnt_off00006885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6885 19440 bytes
SHA-256: 133958083cdf426ef8402adee1cf93dc9f5a8c0e526d888f44ff6a8d5cab2026

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