Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf34f37c8e9a6c31…

MALICIOUS

PDF

44.2 KB Created: 2021-05-13 21:08:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e4cb035f6389df387050db9a89197cb SHA-1: d7c34ae23d812261b016fba89f5aba65279d25ae SHA-256: cf34f37c8e9a6c31a9f1c272fbf1785a4b15085eb96f52085a12e2a2c8ca4cba
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 0.9648

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/coin-master-hack-iphone-game-hack PDF link annotation
    • http://jukebox-fanclub.be/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/coin-master-free-spins-2-5-2021_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/robux-free-c_GM431946152.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/free-minecraft-hosting_GM479516143.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://jukebox-fanclub.be/images/free-minecraft-hacks_GM479516143.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
stream_003_off00004926.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4926 24304 bytes
SHA-256: 3d5054d6b65041fd28885c112548944ceaddb097db129dcf9e96ccd8edd2fb66
font_01_sfnt_off000080df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80DF 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008aca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ACA 18060 bytes
SHA-256: 9ccc1d8bd8827427bdd2e576ac4afcbf92768d6c7b4bf1f6dc8c42a95cbbb1c2

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