Malicious PDF — malware analysis report

Static analysis result for SHA-256 845de13e998a4ca1…

MALICIOUS

PDF

56.1 KB Created: 2021-05-14 22:35:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 50a54be2f77aed2e81c6a130b6dfb199 SHA-1: 43db73211fef7eb727c17a8c4cf996aad329d897 SHA-256: 845de13e998a4ca1119f277820dd0d9deded184693a5daa30e0e1761965274f8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is designed to lure users with promises of game hacks and free items, while also employing a multi-factor authentication harvesting pretext. It contains multiple embedded links, including a primary redirector URL, that lead to malicious infrastructure. The document's content and heuristics strongly suggest a phishing or credential harvesting attempt, likely leading to further malware download or account compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8513

Heuristics 5

  • 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.
  • 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
  • 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.xyz/app/431946152/tryrbx-site-free-robux-game-hack In PDF document text
    • http://artistaone.co/userfiles/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/game-toolbox_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/robux-robux_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://artistaone.co/userfiles/files/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C59 38992 bytes
SHA-256: 1f40165764a46e0e5d5333fb7cb5b1b77af635aa319fe5fb8340e0c1af0aab73
font_01_sfnt_off0000a195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA195 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off0000aba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABA0 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000b8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B2 18420 bytes
SHA-256: c05555d4ecf6fda64d59e10aa7bbdccb6b0b8342b7e9a04540fdd3a1ca0e8435

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