Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6a4ebaf75973539…

MALICIOUS

PDF

45.7 KB Created: 2021-05-10 23:03:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: eb911765a29d898f52d3310adab22678 SHA-1: 664e7b7375a734c8c572fc70fb919424b0a5a810 SHA-256: d6a4ebaf759735397d4bf8dafb0c05868465562334c6fdcc60a66c252f3cf775
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9507

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/406889139/coin-master-free-coins-and-spins-daily-game-hack PDF link annotation
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-to-get-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-minecraft-codes-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-pet-food-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-hack-tool-v1-9-download-free-pc_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mithkromasantulungagung.com/__statics/gudangsoal/files/free-robux-net_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D8C 24332 bytes
SHA-256: d8a02ca02cce26b6d547dd505583874a897e04408a085af73fadbf897cd0be6c
font_01_sfnt_off0000859c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F4E 18480 bytes
SHA-256: afe33923ca989cd5d8a4fb240de59bbfcccaf1928071fdd0e6e63d3de042dc3b

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