Malicious PDF — malware analysis report

Static analysis result for SHA-256 02a6d4cd0796bd54…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 20:55:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2fc95544af5eb7bab37c4d1095d332b5 SHA-1: 12741e274af174e80829d4b6f84d00da01bf3946 SHA-256: 02a6d4cd0796bd5408406f58540f013cdc8f9dafdb54be09ac2b86f00dcf08e4
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 0.9971

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.xyz/app/406889139/free-coins-coin-master-no-human-verification-game-hack PDF link annotation
    • http://www.himalassociation.org/himal/ck_image/files/google-roblox-games_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-hack-online_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-hack-pc-2021_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://www.himalassociation.org/himal/ck_image/files/you-promised-my-son-free-robux_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_003_off00004bad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BAD 24880 bytes
SHA-256: 17903bda390985e95ea3b2c6e8922b905302c0302153b6726880675dcccecba3
font_01_sfnt_off00008499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8499 18244 bytes
SHA-256: 01d63b1d73aa8bf8d24c0c61ee418a5c78711e36496b8284aaee89190376465e

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