Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb704a9b0005f66e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 21:51:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 121fac20b3721c55acd0d7317c3d2bd9 SHA-1: ee16ad3c8b2d3e19cfdb536616fe85ec2f53fee6 SHA-256: cb704a9b0005f66efe644a0b424fab5dbeaae994bccace3fcc342e223f6b7f04
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 0.9980

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 http://netcdn.tw/app/431946152/roblox-inventory-free-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-games-to-play-online_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pokemon-go-free-shiny-celebi_GM1094591345.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/get-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-roblox-code-items-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-clothing-items-on-roblox-xbox-one_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/cheat-codes-for-roblox-prison-life-20_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/legit-coin-master-hack-october-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-launcher-free_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
font_00_sfnt_off000032b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B3 22788 bytes
SHA-256: 433abb2a36564ddaf7abbc821aa64483893e7ee618e292697addcf896c9c9efa
font_01_sfnt_off000065f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F6 18864 bytes
SHA-256: c304121c46178b7351bc143d93840696698488b943d37f1210157b597051c733

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