Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd015a98343e80e…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 04:47:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 369cd183dc74e6a0b608bff04e9c6986 SHA-1: 4c4fceb638d88ff5bfca41887cda225e8a5cbf2e SHA-256: 9fd015a98343e80e7e55fcaab3ff932814ff9122c30ebbe1e5949624915faf6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising 'Coin Master Hack Tool 2021'. The document body and embedded links strongly suggest a lure to download a second-stage payload, likely a game hack or cheat, which is a common pretext for malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-hack-tool-2021-game-hack In PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/aternos-free-minecraft-server_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/minecraft-survival-hacks_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/kachifpro_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/when-pokemon-go-free-will_GM1094591345.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-can-i-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-private-minecraft-server_GM479516143.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
stream_004_off0000516f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x516F 24972 bytes
SHA-256: 6733740edcfb0b415c78bc0815997a46d8281c6e79ab9c6891d543d94338213b
font_01_sfnt_off00008afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AFE 18192 bytes
SHA-256: 811befa785f1ceb1181632f77b53e437429424eef4610f298aaee61bf5104641

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