Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cdef1e0a9691361…

MALICIOUS

PDF

37.9 KB Created: 2021-07-19 23:43:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d9ba2dab556b8acf3bddde6b57c41c88 SHA-1: 8b9e254d849168832b363c25e9673d7253271ac2 SHA-256: 1cdef1e0a9691361b15a44610481c363ffa9cd50d1a8b20a66430d416738c70b
82 Risk Score

Malware Insights

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

The PDF document employs a common lure of 'free Robux' to trick users into clicking a link. The primary malicious URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-on-phone-game-hack, is likely a redirector to a scam or a payload download site. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit user interest in game-related cheats, leading to potential credential harvesting or malware infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.tw/app/431946152/how-to-get-free-robux-on-phone-game-hack PDF link annotation
    • https://porownaj-laser.pl/images/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • https://porownaj-laser.pl/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://porownaj-laser.pl/images/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://porownaj-laser.pl/images/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://porownaj-laser.pl/images/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://porownaj-laser.pl/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://porownaj-laser.pl/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://porownaj-laser.pl/images/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://porownaj-laser.pl/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://porownaj-laser.pl/images/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

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_off00003bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3BC3 23552 bytes
SHA-256: d9838ebcbf669f31ec5ba7e3b510ada944c3c0641c03355814009bc269f8b6dd
font_01_sfnt_off000070f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F4 18788 bytes
SHA-256: 6852338db6f3c7567e169710b83fedb5698b09b1cf918a35efe09c4db198a139

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