Malicious PDF — malware analysis report

Static analysis result for SHA-256 aed7dc53de02652a…

MALICIOUS

PDF

34.5 KB Created: 2021-07-07 18:48:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c897c6ee7f303b539be53564fb115f31 SHA-1: 0d9b8446d0f4e72be4518fdd1eecb1e21d20da3d SHA-256: aed7dc53de02652a523043344af2e9652eeda765f36c147d47d1f97bf5fe3633
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a 'free generator / game hack' lure, directly linking to the URL http://netcdn.tw/app/431946152/make-free-robux-game-hack. The document body also contains this URL and other related links, reinforcing the social engineering tactic. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to redirect users to potentially malicious sites.

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.tw/app/431946152/make-free-robux-game-hack PDF link annotation
    • https://www.cow-style.com.tw/upload/files/coin-master-mod-free-download_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-gift-card-generator-free_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-prison-life-free_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-no-spam_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-2021-where-to-get-free-clothes_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-premium_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-not-clickbait-works-proof_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/robux-page_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/i-was-hacked-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/game-on-roblox-where-you-protect-computers-from-being-hacked_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-hacks-giveaways_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_off00002fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD5 22520 bytes
SHA-256: e82f302375d8df6cebd65197795a3c72223e31b332ce20d53c38a6e6fdc7ffa9
font_01_sfnt_off000061e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E7 19084 bytes
SHA-256: 480c89487a14742f7141225872d5c58d3fe4f75b5aa5747387f60334adf20675

Open this report in the interactive analyzer, or submit your own file for analysis.