Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cc8c6c4b40304d6…

MALICIOUS

PDF

52.2 KB Created: 2021-06-03 11:41:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 17f5182d838a41204bdedf3387318ae2 SHA-1: 66d127d57553147d81a859b28aaeb0351c4c8a54 SHA-256: 4cc8c6c4b40304d6f3c0c35b3bfd132cc20717b073a69eb954cc85dbe45866fa
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 0.9862

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/431946152/free-robux-no-verification-2021-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-card-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-roblox-toy-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-spins-coin-master-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/fb-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-spin-links-coin-master-october-30-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/daily-free-spins-coin-master-2021_GM406889139.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_off00005510.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5510 37876 bytes
SHA-256: 7ded375de55fcec574e54e2adae1b4edf5e029370d08c5460dbcd825000177ba
font_01_sfnt_off0000a7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7F9 19004 bytes
SHA-256: d712ae43aec968503a6d4b8ef93db90b07e4d7d9799b66e9787cf09d99ae12e2

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