Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8c0511716e1404…

MALICIOUS

PDF

36.9 KB Created: 2021-07-05 17:03:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d9a12d2e9ae3d86c1dfe2614cd1b44f6 SHA-1: 228f1e19a751b2a82b0ebbf890fce6d621c33433 SHA-256: 5a8c0511716e14043d1cdcc8189d83997f24762c05cc21f32d1c818b27e188a7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to a malicious redirector, specifically designed to lure users with promises of game hacks and currency generators. The primary link, http://netcdn.tw/app/406889139/coin-master-apk-hack-358-game-hack, is identified as a known malicious redirector. The document body and heuristics confirm the intent to trick users into clicking these links, likely leading to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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-358-game-hack In PDF document text
    • https://library.pqm.co.id/repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-get-free-robux-without-downloading-apps-on-ipad_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-bypass-swears-hack_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/get-robux-today_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-how-to-upload-audio-for-free_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-robux-today-only-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-expire-items-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-speed-hack-on-roblox-sword-fighting-tournament-39_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-free-tuxedo_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-cheats-hacks-free-com_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/roblox-strucid-fortnite-hacks_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-robux-mobile-hack_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • https://library.pqm.co.id/repository/free-robux-hack-on-pc-2021_GM431946152.pdfIn PDF document text
    • https://library.pqm.co.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD0 22544 bytes
SHA-256: 47432da20f29d7297f645a1b3d4aa56fd58c2584d0d286bae9198647d0e2201b
font_01_sfnt_off00006216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6216 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006bfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFB 18696 bytes
SHA-256: 37466016b432fe2c4302c226887fb4a123f095adabdcdeca05fa6b35b2ac340f

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