Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6a54dea9d304ff…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 20:04:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 62946769f58a7f53964cbc0eb621bd60 SHA-1: eea812cef10d3d72bc0d36feb8295b34497fd0ab SHA-256: 8b6a54dea9d304ff6816c5d047653fcd637b7a877c67089687b3e40fdff75d7e
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 0.9865

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.online/app/431946152/free-roblox-accounts-with-robux-that-work-2021-game-hack PDF link annotation
    • http://www.rewaqousha.net/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-game-download-free_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-may-11-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/1x1x1x1-roblox-id_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/claim-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/get-roebucks-com_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_off00005094.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5094 24856 bytes
SHA-256: fe4b722643f10a2b7fa587da71bd6cf262459fb19b9aeb00bc6b43fb3e9f0f4d
font_01_sfnt_off000089e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89E2 19476 bytes
SHA-256: 4c7cb67921980cc467a624d7be0aa4f8f19dcdcb8d4cb789adc94de6f70366aa

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