Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e158e853e1f5507…

MALICIOUS

PDF

45.1 KB Created: 2021-06-03 04:53:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4056f43d7022f76a48ec463bf37966d9 SHA-1: 40f8b3a6fdb80d2ed392df8c11a95b66ef1f2a6d SHA-256: 8e158e853e1f550785c8c906babcf26fe3d5e35bd580d651d284349bd2de2112
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 0.9865

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.online/app/479516143/free-minecraft-codes-2021-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-draw-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/facebook-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/spin-link_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-earn-robux-fast_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/xray-mod-minecraft-114_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_off0000540c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540C 25432 bytes
SHA-256: 3e189e23dbc4672a1ab4801c2372312c9ea3a1e5f5369ccd9a7d780249adc99f
font_01_sfnt_off00008dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD6 18288 bytes
SHA-256: c3cf5bb4a2b6206e2e9676afab3316ea2b1c646b143759ef858dff5c5e762465

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