Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca36ebdb56dc1430…

MALICIOUS

PDF

54.4 KB Created: 2021-05-12 16:12:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2a1b3d9a5ad637cdc00da8fbfd25cf4d SHA-1: 4f740f896f8067dccfd16bdd485cd3054af1b929 SHA-256: ca36ebdb56dc1430afef98992069511765cca75afb9232819e08c14ce2b3ec76
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 0.8602

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/how-to-get-100-free-spins-on-coin-master-game-hack PDF link annotation
    • http://mittlenberg.ch/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/roblox-source_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-domain-for-minecraft-server_GM479516143.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/robux-adder_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/how-to-get-free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-spin-coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://mittlenberg.ch/images/robux-hack_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://mittlenberg.ch/images/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a91.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A91 25376 bytes
SHA-256: be8ea0ce76712b5cee658989732db51124c97c2491de2023378df7a0bef05cda
font_01_sfnt_off0000856f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x856F 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off0000903a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903A 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA360 18328 bytes
SHA-256: 118bed2ee52f9a365e328bc160c828b8a450fef4f79d7a715d30d8386aa97d79
font_04_sfnt_off0000c58b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC58B 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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