Malicious PDF — malware analysis report

Static analysis result for SHA-256 7152bb941f7c9345…

MALICIOUS

PDF

43.8 KB Created: 2021-06-04 00:37:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9fd2e2f6bc2be6250238fd14e5f7d3a0 SHA-1: d31db06d6bc77f9101411a9c415499bd0f42f3c5 SHA-256: 7152bb941f7c9345706a2271d3283e3d41a3ce89cb84bf458756103224acbcfd
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA 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 0.9865

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/835599320/free-followers-on-tiktok-game-hack PDF link annotation
    • http://slim.sisminkada.net/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/pokemon-go-free-90-iv_GM1094591345.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spins-16-04-19_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-spins-on-coin-master_GM406889139.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_004_off00004b3c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3C 28332 bytes
SHA-256: aa38fe5a8a1b4e04f5b9365999f99ed48309ed0b3f1754a2e269060b5eb8d745
font_01_sfnt_off00008a3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3C 17692 bytes
SHA-256: 03131e98da2a54a1a72f5b4aa345640c80e569685032efd5f04fb63d3df01f9e

Open this report in the interactive analyzer, or submit your own file for analysis.