Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a0bb2a22795d7d9…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 06:19:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c6842defc2cb828bb30246379a141121 SHA-1: c670d7635b86e7892ac986ffb77fdf47c383e7e6 SHA-256: 7a0bb2a22795d7d957f8bb62f1285af5371de833a3195de0cab7f2b409628a6b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive 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 0.9865

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/minecraft-realms-free-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-prices_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/mcpe_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-human-verification_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_off0000517f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x517F 25296 bytes
SHA-256: 505c430a7c04bec1e6788f0725b1b23a4662343c38d2dbbdf1bc557e55ffe483
font_01_sfnt_off00008ab7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB7 17900 bytes
SHA-256: badbc394cd8954733b164be5cc8c6ff402afbb9d7774d644eb4a8191a91f4c18

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