Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0090ee70ef044fd…

MALICIOUS

PDF

43.2 KB Created: 2021-05-14 10:01:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: af0d0a7c007f8eb44539f5d8b30ac8e4 SHA-1: 16b22fc4ab63dbc34f9bb45a05594cea5b7627ac SHA-256: b0090ee70ef044fd0a818c993fb4796170e450791505445086ee4d0feae3cbc8
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 0.9969

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.xyz/app/406889139/how-can-i-get-free-spins-on-coin-master-game-hack PDF link annotation
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-july-29_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/coin-master-connection-lost-hack_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/minecraft-client-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/login-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://elearning.mtsdarulhikamcirebon.sch.id/__statics/gudangsoal/files/how-to-hack-someones-account-on-roblox_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_off00004db0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DB0 25348 bytes
SHA-256: b203f0789ec16371f015eb123dff7bc0ea5628a53d68c13f0468727809413ecd
font_01_sfnt_off0000877f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x877F 18052 bytes
SHA-256: f4ab70c7a1b321e89283bf56011259b2481f340c7b70b557de06403c5562b8cd

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