Malicious PDF — malware analysis report

Static analysis result for SHA-256 f025438e9a70e46f…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 01:00:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fc9115eca00c87143597af5931746813 SHA-1: aa37274710fa90f64a14c4cfd822f98b29e93d55 SHA-256: f025438e9a70e46ff4845f66b04777a1936d0d2fc8288ea599604f21bf4f12e1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and lures related to game hacks and free currency, specifically for 'Coin Master'. The primary URL, https://netcdn.xyz/app/406889139/coin-master-free-spins-and-coins-today-gift-reward-game-hack, is flagged as a game hack redirector. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a social engineering tactic to drive users to potentially malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.xyz/app/406889139/coin-master-free-spins-and-coins-today-gift-reward-game-hack PDF link annotation
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-apk-download-for-android_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coinmaster-free-cards_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikesmi.ac.id/repository/coin-master-unlimited-spin-hack-apk_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
stream_003_off000049c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C9 24024 bytes
SHA-256: 3b06d968746d2bc94b37f782d67fb2d35af84985cc85c3f49c8b66628f5d934a
font_01_sfnt_off00008092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8092 18404 bytes
SHA-256: 20323906fae34ef48fb3028b175607ed26afea8233a7a83525bcd6516f32abbb

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