Malicious PDF — malware analysis report

Static analysis result for SHA-256 7052d4fcb59cf0c2…

MALICIOUS

PDF

35.5 KB Created: 2021-07-08 09:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 7c23b136ea0d12af9571d93165305e94 SHA-1: 307f5cebe022556171f2c5e356749a2528da3a8a SHA-256: 7052d4fcb59cf0c2029c9f48b596586484a81a1b448852be7050b671689cdb34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users to download game hacks or cheats. The primary malicious link is http://netcdn.tw/app/406889139/coin-master-apk-hack-download-game-hack, which is part of a known malicious infrastructure. The document's content and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites.

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.tw/app/406889139/coin-master-apk-hack-download-game-hack In PDF document text
    • http://www.digilib.uim.ac.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-hack-farming-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roxpoes-roblox-exploits--hacks_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/da-hood-roblox-free-dowlond_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-generator_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/roblox-hack-exe-download_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-admin-on-any-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/coin-master-hack_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
font_00_sfnt_off000031ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EA 23272 bytes
SHA-256: f2781392fb947446bf4cbc0369462f43c09c27660e95faacfe1e27c79d367ad8
font_01_sfnt_off00006669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6669 18760 bytes
SHA-256: 30bf4c30f3c0eb142596fd9d0e19526318396ceed582c1749ee22e7ad80b2b4d

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