Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4557b80fbcf3447…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 04:45:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9dcc1fd036924f9fd6fcbd3c1edbb829 SHA-1: 5fb42e77a32fe7347d5ae1b42cc6691f6c502eb2 SHA-256: c4557b80fbcf3447b0fe68e6fef11909379dbb36625dc2276cca1db793d447d9
82 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and a lure related to game hacks, specifically for Roblox and other popular games. The primary URL, http://netcdn.tw/app/431946152/roblox-shinobi-life-free-spins-game-hack, is flagged as a redirector and likely leads to a malicious payload or phishing page. The ML classifier strongly indicates maliciousness, supporting the use of this document as a malicious attachment.

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.tw/app/431946152/roblox-shinobi-life-free-spins-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/git-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-obby_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/como-hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-tiktok-followers-no-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/god-mode-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-adidas-shoes-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-speed-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/guuud-info-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-hack-apk-35-33_GM406889139.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_off00002fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC8 22756 bytes
SHA-256: 6b3146184034f426ad22e2af9f6d0cfa72a722ababdfdc9f9d36f4c3651963cd
font_01_sfnt_off00006302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6302 18928 bytes
SHA-256: 5bfd4b2eef9ded7d5e324ad8aa07ba0f151882aae3c56a5e12a2e139f1fcff60

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