Malicious PDF — malware analysis report

Static analysis result for SHA-256 798eeb2e42c11742…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 03:21:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 02533147e23b829b990a9000d53c961c SHA-1: 974f664bad6a935745a4a11b61e660d83b962f4b SHA-256: 798eeb2e42c1174288981875c95977db464602e4fb6e8242892900e16b09481e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly indicates malicious intent, and the presence of numerous related URLs reinforces the phishing and potential malware distribution vector. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or redirection attempt.

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/free-robux-just-enter-username-game-hack PDF link annotation
    • https://smark.com.tw/image/data/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-robux-hack-yourself_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-roblox-gratuit_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/hack-into-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/how-to-get-robux-on-xbox-one-for-free_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/free-roblox-admin-in-any-game_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/fbchampion-com_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/minecraft-login-free_GM479516143.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/download-portable-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://smark.com.tw/image/data/files/blox-supply-free-robux_GM431946152.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_off00002ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EDE 22452 bytes
SHA-256: 5667aa1051a11ff4676fea3a7dd42bde71e957143d4cbe693dc591fd0bfe62a0
font_01_sfnt_off000060ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60CE 19244 bytes
SHA-256: bb42f0e36b7288fba8af59efb142b286361a630cbb1699ef387bab73f1413400

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