Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc2d3e258619fec4…

MALICIOUS

PDF

35.4 KB Created: 2021-06-30 11:27:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 07bf889b586561b279ba06ec918a6acd SHA-1: 09702f87a263e0b1bd5b404b4334118d592267f7 SHA-256: bc2d3e258619fec44b4b89b7f759cf7999774d29b6230c53e7cfb7619c61f67f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and sites offering game-related cheats and currency. The document body and embedded URLs suggest a lure for free game items, which is a common tactic for phishing or malware distribution. While no scripts were explicitly extracted, the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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 http://netcdn.co/app/431946152/free-roblox-gift-card-codes-2021-december-game-hack In PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/gametest-roblox-com-free-obc_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-hack-online-pc_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/show-me-how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/wurst-commands_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/robux-come_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/how-to-hack-roblox-accounts-using-roblosecurity_GM431946152.pdfIn PDF document text
    • http://sellitafrica.com/media/storage/editor/files/hack-roblox-fly_GM431946152.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
font_00_sfnt_off00003150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3150 22372 bytes
SHA-256: fead57f1aa1d36a0581877df445b5fb9c4ce3b1435903907d60a52f2f2226ef5
font_01_sfnt_off000062d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 19880 bytes
SHA-256: bc7cc6a1a037706d9db5ac099c25f4bcab7794284a148b01492c7a6488648245

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