Malicious PDF — malware analysis report

Static analysis result for SHA-256 d652c0398dff2df6…

MALICIOUS

PDF

51.7 KB Created: 2021-06-04 00:22:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 77032159d045640a59be18fabd2e4173 SHA-1: b6885688457e1172249ffaef6774b54eced04367 SHA-256: d652c0398dff2df6da9ad9d8a4473034f2b391af002f535846b2a4ead88f8c0e
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 0.9464

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/431946152/how-to-get-free-robux-with-no-verification-game-hack PDF link annotation
    • http://lib.kesdammedan.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-hacks-reddit_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/www-rubux_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/coin-master-free-download-app_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id//repository/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/blox-rewards_GM431946152.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.kesdammedan.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5148 24736 bytes
SHA-256: d4570d49d5ffad2b6c1df35a281068bcea0d4b5a1237ab19495d92e77d4ba1b6
font_01_sfnt_off00008a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A2B 8132 bytes
SHA-256: 7b13f62dd83f6e5b39d850f66139f44fff841e4e695f86fdfbe4d5a2de470bf2
font_02_sfnt_off0000a51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA51C 19128 bytes
SHA-256: acb72b37f9b0a7ac0fa23716fb81d4af9379ab539551c05381b29cd372bdbe33

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