Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de8f4b72ac1fc39…

MALICIOUS

PDF

35.0 KB Created: 2021-07-04 15:51:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: b96ccb99684658b8a7077d8d140425c3 SHA-1: 14f21916d9ac8f8842c41e0a9568b0a6e7a2e70e SHA-256: 1de8f4b72ac1fc3903e1ad23e672fb5eff1a63beed3a31f5b3043e56883e6ec6
160 Risk Score

Malware Insights

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

This PDF document employs a lure of game hacks and free currency to trick users into clicking malicious links. The primary link, http://netcdn.tw/app/431946152/robux-hack-2021-game-hack, is identified as a malicious redirector. While no scripts were directly extracted, the PDF structure and embedded links suggest a potential for exploitation or redirection to a malicious site, likely involving JavaScript execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/robux-hack-2021-game-hack In PDF document text
    • http://thamelinn.com/userfiles/files/pubg-uc-hack-no-verification_GM1330123889.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-and-coins-generator_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-roblox-no-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-get-free-robux-august-2021_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/tiktok-follower-bot-free_GM835599320.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-tiktok-likes-2021_GM835599320.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/cheats-for-pizza-place-roblox_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/roblox-hide-and-seek-extreme-hack_GM431946152.pdfIn PDF document text
    • http://thamelinn.com/userfiles/files/coin-master-free-spins-and-coins-app-download_GM406889139.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_off00003063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3063 22712 bytes
SHA-256: 82da67f11d7634a2c5d9cb9811ce0d37c9d2a057b14572872d7f8d065c9632a7
font_01_sfnt_off00006338.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6338 19124 bytes
SHA-256: a01abce438ace15ff0d22223d5cc83267d648dadbc6e7de58085c68645cb2558

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