Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c76971917dee49…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 10:15:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4e3a5d766870d1ecd6f01b0b797bf46a SHA-1: b20bd7f33bbacb44f4155edd899d396821edf0e9 SHA-256: b4c76971917dee490bdfaa84b751de82f6b2ea85788b15dba86c492e55ace3a8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are identified as lures for game hacks and free in-game currency. The primary URL, 'https://netcdn.online/app/406889139/coin-master-free-spins-android-game-hack', is directly associated with a game hack lure. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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/coin-master-free-spins-android-game-hack PDF link annotation
    • http://lib3tell.stptrisakti.net/repository/pubg-uc-kart_GM1330123889.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/haktuts-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net//repository/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib3tell.stptrisakti.net/repository/free-robux-offers_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_004_off00005210.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5210 25900 bytes
SHA-256: e781d01415509bc4642683eb3b805ac1a469558b5ef7aa3e2f1e3c6e801b6ca9
font_01_sfnt_off00008b9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9F 2868 bytes
SHA-256: 00109425b76763440a5569341faade0445b3c9f8514523a6f287fddbc9082efe
font_02_sfnt_off0000958c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x958C 18060 bytes
SHA-256: 7f8980b6f3213b204c7b050e62c653166806b65682437d624869b2fc7a4cb6a7

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