Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1edfc904d486f7c…

MALICIOUS

PDF

36.7 KB Created: 2021-06-03 04:57:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cf71b0afc9dbee7aeef574b94aa34f14 SHA-1: a24a3347fd08f37635337f3e91ba11bbe668e2c2 SHA-256: b1edfc904d486f7cecaa6125996f5f69c1246d1d13de883bceca9ae4acae7621
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 3

  • 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.
  • 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-hack-uk-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-date-and-time-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/tiktok-free-on-google_GM835599320.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/tiktok-free-online-unblocked_GM835599320.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-download-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000519a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x519A 24496 bytes
SHA-256: 2ec176f0b9e3e9b3d37774660c3de80e437142bfcb8ad9755606bdde74826725

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