Malicious PDF — malware analysis report

Static analysis result for SHA-256 8612f2e3b4c2dffd…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 00:53:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4ae04f73880511d2ceb20a83a63449a9 SHA-1: b0a81e4d24d80929f117328f9ef73df2fe6fbd2c SHA-256: 8612f2e3b4c2dffd9bd2a21bded1d35bfd4e4d4681cad79e19ad8adcf81d47b2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/free-robux-pro-tv-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

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/free-robux-pro-tv-game-hack In PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/minecraft-pvp-hacks_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/roblox-you-can-play-for-free_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/krnl-download_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-to-get-free-robux-using-your-phone_GM431946152.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/how-much-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://perpustakaan.stiq-amuntai.ac.id/repository/coin-master-free-coins-and-spins-link_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_off00002e99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E99 22552 bytes
SHA-256: 2d8528d11247224939c90bb9d5e19bb8264d10e27efb4a91bfd3ae6aaf2fc778
font_01_sfnt_off000060e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E6 18984 bytes
SHA-256: c19a450ef1826679ee42db65a61c50c59a03b59f7ede7f7f59be94e3e9479c79

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