Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fc246fb4d2f7eef…

MALICIOUS

PDF

32.5 KB Created: 2021-07-19 01:32:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: cd959ee72fb80c81e0f89bb5cb100a15 SHA-1: 9f4a0e84931df32054760219a491ad5985ae15f6 SHA-256: 4fc246fb4d2f7eef0e6406d94eaa12dd03c699aa25b2df58492a4cca1e4e0e87
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document uses a "game hack" lure to entice users to click on a malicious URL. The document body contains text and links related to hacking Roblox accounts and obtaining free game items, which is a common social engineering tactic. The embedded URL `http://netcdn.tw/app/431946152/how-to-hack-peoples-roblox-accounts-game-hack` is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9532

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-hack-peoples-roblox-accounts-game-hack PDF link annotation
    • https://abqyorkrite.org/images/free-robux-script_GM431946152.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://abqyorkrite.org/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://abqyorkrite.org/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://abqyorkrite.org/images/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • https://abqyorkrite.org/images/how-to-install-minecraft-for-free_GM479516143.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_off00002791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2791 22608 bytes
SHA-256: c6d058d3704086280cac172237d4ca349ff715e7038228924119ec2a0059877d
font_01_sfnt_off00005a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A66 19108 bytes
SHA-256: 3cca992b89e738ca0e0fc5d204c59383ee6ad597b33237d2d42885b29afa3b03

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