Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f9c93193e2d198…

MALICIOUS

PDF

34.6 KB Created: 2021-06-25 06:55:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ecd7b412d8cad7903febd318a3f173d7 SHA-1: 68e4232e928856f91a360409447599292bc8f061 SHA-256: b0f9c93193e2d198d24c426c199ad2f31c655d5c4a68b742c42c03054dd6f93b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains a large number of external links, many of which are presented as 'game hacks' or ways to obtain free in-game currency for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of such links, suggesting a malicious SEO or link farm strategy. The primary lure appears to be directing users to potentially malicious websites via the embedded URLs, such as http://netcdn.co/app/431946152/roblox-emergency-response-liberty-county-hack-script-game-hack, to download unwanted software or compromise accounts.

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 http://netcdn.co/app/431946152/roblox-emergency-response-liberty-county-hack-script-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/hack-para-simulador-de-levantamento-de-peso-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hack-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-cheating-dll_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/oblivion-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/all-links-for-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/robux-game-com_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-do-you-hack-roblox-users_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/bloxland-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/como-hackear-juegos-de-roblox-2021-sin-descargar_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEF 22016 bytes
SHA-256: fd71b151caccdc9561a0fcc1b38d1eba8bea06999549618a18d64d4c3daf14ee
font_01_sfnt_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 19636 bytes
SHA-256: dd081d7390fbe4af24363e2fa05bbf86c34c8e2a2ebececf878a86e09cd63f79

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