Malicious PDF — malware analysis report

Static analysis result for SHA-256 7af7c54b1618888a…

MALICIOUS

PDF

35.9 KB Created: 2021-06-20 11:44:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1a7703010f9e0ba17727b44db0c7719c SHA-1: b99238ed5b71c0922eee02b29d039a556e5e45a1 SHA-256: 7af7c54b1618888a8cab68c382d544cc340c525f1f77d8f752c25bfac2e703ce
82 Risk Score

Malware Insights

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

The PDF document contains multiple links and references to 'free Robux' and game hacks, indicating a lure to a potentially malicious website. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly suggests this intent. The ML classifier also flagged the PDF as malicious with high confidence. The primary IOC is the redirector URL found in the document body and heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-2021-codes-without-human-verification-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/why-is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/old-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-robux-in-5-seconds_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-items-website_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox4allcool-hack-team_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/dragon-ball-legendayr-powers-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/como-conseguir-robux-gratis-sin-hacks-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/discord-for-roblox-swear-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-generator-computer_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-jailbreak-hack-speed_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
font_00_sfnt_off00003212.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3212 22268 bytes
SHA-256: 36cf5c482cf4f6161203e7160dfc9e761d505709b6bdf78eedc8ddac5caa5aed
font_01_sfnt_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 20276 bytes
SHA-256: fd8e2f435b5979f9ba183beb77e5dfff328f2de341bb06b75f0b83eae39685e9

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