Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8dd959a07645632…

MALICIOUS

PDF

44.2 KB Created: 2021-05-17 01:43:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8d614a222d0820c461206cc7dd9ae4e0 SHA-1: e9f2780d05b12b5084bb4f7d70968aa862660f05 SHA-256: b8dd959a0764563293a3cfdeba7b1e5888f3cc3cdd35b42a6fe2c37d79e94ad0
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to websites that promise free game currency or hacks, indicating a lure-based attack pattern. The heuristic 'PDF_SEO_LINK_FARM' suggests a large number of external links, likely intended to drive traffic or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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-websites-that-actually-work-game-hack PDF link annotation
    • https://www.donjastubica.hr/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/can-you-still-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/como-hackear-el-juego-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/hack-coin-master-dzooka_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/daily-free-spins-coin-master-2021_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
font_00_sfnt_off00004b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B12 26588 bytes
SHA-256: ca627d5922da1ba0c08af3342026ac4a34ce3c83c4cba90595d72c49fee52317
font_01_sfnt_off000087cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87CB 19252 bytes
SHA-256: f49525d2cb353299e95430044cca9c62699809686ebb763340304ea0e82a2cbb

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