Malicious PDF — malware analysis report

Static analysis result for SHA-256 debb5ebeb08b8e18…

MALICIOUS

PDF

43.8 KB Created: 2021-06-04 00:00:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 081714f54857a1b915e40129a129c1e3 SHA-1: 7d9ec2113efae7b760c852ab83b11063c678480f SHA-256: debb5ebeb08b8e18da6ac85079d64a917479132d77ef754f5d146b85c3b205d2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body, though heavily obfuscated, contains references to game hacks and the same URL. The presence of embedded URLs and the nature of the lure suggest an attempt to trick the user into downloading or visiting a malicious site, likely for credential harvesting or malware distribution.

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/coin-master-free-spins-today-39-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-android_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-homepage_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-coins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-co_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-cards-pin-number_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-coin-master-ios_GM406889139.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_off00004e81.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E81 24816 bytes
SHA-256: 04194fe74533551f17f328fcfdad66584f848f68233322e85e57e1f7850ff9e7
font_01_sfnt_off00008786.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8786 18576 bytes
SHA-256: abdd8853cbf628f5d8ff2d6ea673334edcb218f8100f9321070c8917c9681aec

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