Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6408ba030c41c91…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 20:07:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 9b3dd20e1277d00855ec95b20bc9a30b SHA-1: 0c40b06325c5eb208fb147d5aa74b79d7038708d SHA-256: d6408ba030c41c910e3db000094c1b96872ebd8e10eba26eb791f81fb9de3e7b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or free items. The primary malicious URL identified is http://netcdn.tw/app/479516143/minecraft-114-4-download-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive users to potentially harmful websites.

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.tw/app/479516143/minecraft-114-4-download-game-hack In PDF document text
    • http://perpustakaan.idia.ac.id/repository/get-free-roblox-card-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/tiktok-free-views-2021_GM835599320.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/roblox-online-free-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/google-play-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-unlimited-spin-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/how-to-win-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/cupcake-jailbreak-hack-download-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://perpustakaan.idia.ac.id/repository/coin-master-free-in-app-purchases_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_off000030e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E2 22028 bytes
SHA-256: 8eab88e2d60071ae34a4f002b320d16abdb1bf10143e9d368093598675d557a8
font_01_sfnt_off000061a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 18744 bytes
SHA-256: e04c8dad389fa8ddb6e9166dcfd52ae6ae64cc707c2c66a8db2dd3b8bc072aff

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