Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9e99e515ba0cd7…

MALICIOUS

PDF

41.0 KB Created: 2021-05-17 04:33:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 4470d4c4b23f83ab7990644574b53699 SHA-1: 924b59b234824a837f85495b2c2426ed8f37731f SHA-256: 7d9e99e515ba0cd76cf4fa9a2344f23f6be02ff18ffb9ef9a40137903b896ace
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9971

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/406889139/coins-master-hack-game-hack PDF link annotation
    • http://www.isovca.com/images/114-hacks_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/gaming-dunia-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/free-promo-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/roblox-login-hack_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://www.isovca.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/coin-master-in-app-purchase-hack_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://www.isovca.com/images/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://www.isovca.com/images/websites-that-give-free-robux_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_off000046fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46FA 24616 bytes
SHA-256: 9782728183f838a65db2549478d0e24e1ac0bdb4492877e3944359833e0f2567
font_01_sfnt_off00007f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F45 17716 bytes
SHA-256: d488acdeac9c101f8c7dc9d2f61752a744fbde28c1faa2289984f0ec4d4cc76f

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