Malicious PDF — malware analysis report

Static analysis result for SHA-256 9873462201b984ef…

MALICIOUS

PDF

48.7 KB Created: 2021-06-10 23:06:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0ce12fc72d5ad492e2086bc3ecad1e4a SHA-1: e1a31c9ea66f2118241a5700274d754c9a588dcb SHA-256: 9873462201b984ef2c90a2c1cc3c729bd83228b5b18135a846264a5bfb89ad0b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link that directs users to a known malicious redirector, disguised as a 'Roblox Clone Tycoon 2 Codes Hack'. This lure is designed to trick users into visiting potentially harmful websites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.tw/app/431946152/roblox-clone-tycoon-2-codes-hack-get-1-billion-gems-game-hack In PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/pokemon-go-free-coins-no-survey_GM1094591345.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/ww-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-minecraft-mods-for-ps4_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/can-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-birthday-card-online-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-promo-code-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/como-tener-ropa-de-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-attack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-robux-online-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/abs-t-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-by-joining-a-group_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005546.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5546 24812 bytes
SHA-256: c1d2734d7b77f3ee55cb2101a80b93b886307dd9d63b6867b7293ef02e70df72
font_01_sfnt_off00008e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4E 2976 bytes
SHA-256: 3789135e37d9714b24055a84ccc8042ee13d52c7a0e9e0e8e5f787af57f0f966
font_02_sfnt_off000098a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98A2 19248 bytes
SHA-256: 0cfb1f2f1b73e904d439ce1ab063c36b549deabf454c852a047c749c2d2ff63b

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