Malicious PDF — malware analysis report

Static analysis result for SHA-256 89b7fb0a16560b58…

MALICIOUS

PDF

47.4 KB Created: 2021-06-08 23:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 4bd4a028556b8a159214803bd7275176 SHA-1: 5d722357b1c17f9cfbf29cab656e51624626fa88 SHA-256: 89b7fb0a16560b58e763dc0f25a7d520f165c850434477538b00768c3a23536a
182 Risk Score

Malware Insights

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

This PDF document employs lures related to game hacks and secret recovery, aiming to trick users into clicking malicious links. The document contains multiple URLs pointing to sites that likely host further malicious content or phishing pages. The ML classifier also flagged this PDF as malicious, increasing confidence in its threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 6

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 https://netcdn.tw/app/431946152/hack-roblox-espaol-game-hack PDF link annotation
    • http://sbm-nn.ru/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-bonus_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-hair-codes_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-facebook-page_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-de-robux-2021-gratis_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-shionbi-life-max-lvl-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-robux-into-your-account_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005088.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5088 26548 bytes
SHA-256: c1f5c2d6f58758813e66caa39612694e3a781e5bb45c6d84a20789aec2e07ea5
font_01_sfnt_off00008c17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C17 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9627 18356 bytes
SHA-256: e90c7c31c20eee7b6fd43bb74fdc229010d9b9384fd80a7a4a30180de7d1714f

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