Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ea226027c5a5300…

MALICIOUS

PDF

43.1 KB Created: 2021-06-03 19:55:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f606b484cb3a33e1a0ba81ca402b2d7b SHA-1: 5e1ba7239ff520caab88cb9977d2a3a8dfaec560 SHA-256: 9ea226027c5a530094ecbe60906cb3dddcc1c3f9d7b8e2555c2289f36643798a
142 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. It uses a seed-phrase/secret-recovery 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 0.9865

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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/406889139/coin-master-34-5-hack-game-hack PDF link annotation
    • http://www.rewaqousha.net/userfiles/files/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/robux-for-surveys_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-coins-app_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.rewaqousha.net/userfiles/files/how-to-hack-coin-master-ios-jailbreak_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_off00004ff3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF3 23972 bytes
SHA-256: 46fae07e11c9229a54bb9666af54a92eebe6720efa94396615b9b8a87ccb6eec
font_01_sfnt_off0000864e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864E 18084 bytes
SHA-256: 4ed86f500da5b221f2e83bbf50b9a95e6e4e647dd84dd10545afbd7c082aa46c

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