Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65c7b06f11bb0fe…

MALICIOUS

PDF

37.0 KB Created: 2021-07-08 16:16:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 12720db3bb08585520650413a79fa679 SHA-1: a178352c67b83dcbc40e330884dbc9b8c238f687 SHA-256: f65c7b06f11bb0fe0d3574342a32ced4188054ce88b7f0710e6503ee19135e86
160 Risk Score

Malware Insights

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

The PDF document contains multiple links, including one identified as a malicious redirector, that lure users to sites offering game hacks and free currency. The primary link, http://netcdn.tw/app/406889139/coin-master-free-spins-link-2021-twitter-game-hack, is associated with known malicious infrastructure. The document body and extracted URLs reinforce the social engineering pretext of providing free in-game items.

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-free-spins-link-2021-twitter-game-hack In PDF document text
    • https://privatearrangements.co.nz/public/files/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/100-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/is-coin-master-free_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/roblox-boku-no-hero-academia-hack_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-download-roblox-on-computer-for-free_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/free-robux-promo-codes-2021-april_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/download-cheat-engine-64-roblox_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-get-stuff-that-cost-coins-free-mpe-master_GM406889139.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://privatearrangements.co.nz/public/files/descargar-coin-master-hackeado_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_off00003849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3849 22992 bytes
SHA-256: 063aa205afab7008155f01fa0f0c4d637d2d892ff14b8a2d214e283cd21f8462
font_01_sfnt_off00006bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BED 18908 bytes
SHA-256: b043e4a019f31cebff09b938e1120b84c3066f7adfb90df1330482920140b640

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