Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c79012896f2330…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 01:31:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 376a57292de4c680c470afec0fcf2c05 SHA-1: 776870d7ec73e2ebc3f46b50c9a53e434768601d SHA-256: f7c79012896f233042ac7a86fbb64fd5079bf0a3d8a125c3134e495c6d4ae42a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a specific URL. The ML classifier also flagged the PDF as malicious. The document body, though heavily obfuscated, contains references to the same URL, suggesting it's the primary lure to entice users to click and potentially download a secondary payload.

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/406889139/free-spin-link-for-coin-master-game-game-hack PDF link annotation
    • http://library.smpn2-byl.sch.id//repository/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/adopt-me-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/near-tiktok-free-fire_GM835599320.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/spin-coin_GM406889139.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://library.smpn2-byl.sch.id//repository/roblox-free-roblox_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
stream_004_off00004e91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E91 29072 bytes
SHA-256: 0ee222849401de441763f5764c2d7e978ebdd6fae946d34e33df6f8a876e7d40
font_01_sfnt_off00008b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B1B 18316 bytes
SHA-256: 4ad106dc66915d7a7c54c506e35e2e74cb7406920644c521a55874c4c44ea7c2

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