Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8fc84cd886cff3…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 11:57:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: e495b4e8affab1eb5e712ee3feda6edd SHA-1: 56ba149e0e746a0d1091ad7a148bcc84c473172e SHA-256: 0d8fc84cd886cff39a55198a3ab07fb1e2e4209cac8c0211acba553b9e3d1081
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to websites offering game hacks and cheats, such as 'Roblox Admin Gui Hack'. One of the primary links, http://netcdn.co/app/431946152/roblox-admin-gui-hack-game-hack, is flagged as a malicious redirector. The presence of these lures, combined with the ML classifier's high confidence, indicates a malicious intent 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.co/app/431946152/roblox-admin-gui-hack-game-hack In PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-free-cloth-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-unlimited-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/pubg-uc-wholesale_GM1330123889.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/rpg-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/hacking-beyond-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/what-is-a-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-robux-free-on-pc_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-games-using-check-cashed-not-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-apk-114-4_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-daily-free-spins-and-coins_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_off00003269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3269 21884 bytes
SHA-256: 776ce138665942afa533565b62e5df03526b0e099c178bdef8a5e67eb147109c
font_01_sfnt_off000062b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B9 19352 bytes
SHA-256: fe9875e67a624842a8985a5198147e9f6a99fa06d94f3e3dd3956b78d2b9a289