Malicious PDF — malware analysis report

Static analysis result for SHA-256 46db9a68b10a135a…

MALICIOUS

PDF

46.5 KB Created: 2021-06-10 22:29:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf8f90b9b5d047d80753d6765659ace2 SHA-1: db3fb825f3ebd6c2af49d9bc63c2d6eec5b481df SHA-256: 46db9a68b10a135ab2725f2d065dd47bf790b56f42203bc891855ceb683220f0
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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.tw/app/431946152/change-your-roblox-name-for-free-reddit-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-shirts-templates-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-doge_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/pokemon-go-free-android-download_GM1094591345.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-meme-clothes_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/150-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/can-you-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-blue-hair-com_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-coin-master-cheats_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-to-hack-roblox-accounts_GM431946152.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_off0000516a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x516A 27044 bytes
SHA-256: 75c20955bcd58350c4ae2ce9e2869d97c5d3c8bf668e10cffaa6b664bd9d284b
font_01_sfnt_off00008f61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F61 19592 bytes
SHA-256: 96ea384023eb0c3da6ce8611900213f3325060453e8b547f251aa096e4767331

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