Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef4330789211c29e…

MALICIOUS

PDF

47.6 KB Created: 2021-05-13 09:40:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 236c9ee6837d15a872593bfacbd86da2 SHA-1: c5703db8ba07695479d7cb9476b924b5270cb59b SHA-256: ef4330789211c29e127eb03bf14aa0f581e4c3c7815b873261614dd4bfa09e5f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9013

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.xyz/app/431946152/free-robux-not-a-scam-game-hack PDF link annotation
    • http://www.arichuna.com/images/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/hack-the-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-vip-roblox_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://www.arichuna.com/images/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-spins-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-100-robux_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.arichuna.com/images/files/hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://www.arichuna.com/images/files/hack-para-coin-master-singapore_GM406889139.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_off000047a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A2 28344 bytes
SHA-256: 57dcf73357eda6a47575ae00530ee347d414ff74c26add12f0df8ce02c39ac6f
font_01_sfnt_off000089c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89C4 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off000096d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96D6 18608 bytes
SHA-256: 99f87fd07008d852f5f659b56544f95afedf5ace2cc64bf1a6de85fca727b1b9

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