Malicious PDF — malware analysis report

Static analysis result for SHA-256 757bb05cf0970035…

MALICIOUS

PDF

44.2 KB Created: 2021-05-14 13:22:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 2981f7eee8a1818e7bfa4c86c708ef58 SHA-1: 97c3bb0861878e574a1edd820b2616aeacb0b24f SHA-256: 757bb05cf0970035bb3fab80e7a6dcf0c5332af9eed32604011fa9709aa794d8
200 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically advertising 'free Robux' and game hacks. The presence of an MFA lure suggests an attempt to harvest session tokens or credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/free-robux-offers-game-hack In PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/pig-master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-games-coin-master_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/robux-premium_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-robux-live_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/can-i-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/roblox-controversy_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/best-minecraft-hacked-client_GM479516143.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_003_off00004cf7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CF7 27356 bytes
SHA-256: fb185d1144d8c93f881fb7faea17236c122de4d37703beb30a78e7a8bb5a7432
font_01_sfnt_off00008b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B68 18012 bytes
SHA-256: 2fb616bca13af88ff89276a9b2d2fcc075dc4ebb9507e4cf45ab0719cef726f6

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