Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fd551a9cfd7fa43…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 23:18:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 371b9c2be4247bc0b6a9860d97d8788b SHA-1: 7c783205ea18986ea435eaa757e611e4d7c0253e SHA-256: 6fd551a9cfd7fa438cacc476856c51eb76f3d47efe15dcc19d519661658fafb2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that are designed to lure users into clicking on links related to game hacks and free in-game currency. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spin-and-coin-link-haktuts-hacking-news-game-hack, is flagged as a game hack redirector. This suggests the document's purpose is to drive traffic to potentially malicious websites that could host phishing pages or distribute malware. No scripts were extracted from this sample.

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/406889139/coin-master-free-spin-and-coin-link-haktuts-hacking-news-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/wallbank-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hack-to-train-railway-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-final-stand-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/hack-robux-into-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-steves-one-piece-stat-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-wallpapers-for-roblox-fps-games_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-vip-server-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/como-obtener-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/village-4-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-character-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/robux-hack-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-card-hack-app_GM406889139.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
stream_002_off000030af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30AF 23276 bytes
SHA-256: bd7f0f6a5e2504bb7e8df65437fba2286c8a5b3a2f07f724323d8278723b7c4d
font_01_sfnt_off00006520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6520 18824 bytes
SHA-256: 028a7533a0cffe48b6a3e73a5ec4a7571f128d14e74948211d37bb39bd0384d4

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