Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16c543d1d9df9a7…

MALICIOUS

PDF

34.6 KB Created: 2021-06-21 23:43:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f1c2e0fc8bd41f4f94aff5d0de55b25f SHA-1: 17fef7cdfcadaf1ad989c9ddcb1c1bbb259a63f7 SHA-256: e16c543d1d9df9a78c0b2012b8f95cfd9c3a97ea02452e1bbab0491c767ff71e
142 Risk Score

Malware Insights

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

This PDF document functions as a lure, directing users to a link farm of other PDFs that promise free game items or hacks. The primary URL, http://netcdn.co/app/479516143/minecraft-beta-free-game-hack, is likely a redirector to malicious content. The extensive use of PDF link farms and game-related lures suggests a social engineering tactic to drive traffic to potentially malicious sites.

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/479516143/minecraft-beta-free-game-hack PDF link annotation
    • https://www.hearcolors.com.mx/img/blog/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-veil-exploit-free-download_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-roblox-codes_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/pokemon-go-free-items_GM1094591345.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/roblox-egg-farm-simulator-hack_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.hearcolors.com.mx/img/blog/files/tiktok-free-online-games_GM835599320.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_off000032c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32C2 22668 bytes
SHA-256: c29b75c18fd91727cd88ea781b15347cc032a7064b6db1351d514d5211753477
font_01_sfnt_off0000653c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x653C 18072 bytes
SHA-256: 93eaf246314330a04d19d7a2ad76ecc13e18bc21eade9aedb21d3f8ca46bad9f

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