Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff5387367bfa3b9…

MALICIOUS

PDF

34.9 KB Created: 2021-06-30 07:20:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 06fc3166a571aa1700ef692653d621f8 SHA-1: b3b28088b0610c06029f5078283793c9f3e3b2b6 SHA-256: dff5387367bfa3b9abb3a6ba4278e667b2ae8c141ae68178548706cb0a0162b2
160 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users interested in game hacks and generators. The primary URL, http://netcdn.co/app/431946152/roblox-mad-city-hack-script-pastebin-game-hack, is flagged as malicious and part of a redirector chain. The document body reinforces this by mentioning 'Roblox Mad City Hack Script Pastebin' and embedding numerous links related to game cheats and free items, all pointing towards the malicious domain.

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.co/app/431946152/roblox-mad-city-hack-script-pastebin-game-hack In PDF document text
    • https://www.twpuc.com.tw/upload/files/pokemon-go-free-30-ultra-balls_GM1094591345.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-premium-roblox_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.twpuc.com.tw/upload/files/haktuts-coin-master-free-spins_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_off00003082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3082 21976 bytes
SHA-256: 279ceb9fba096df1a706b26d2ce0f67c06b68bdd57843e12e6642724d65b4822
font_01_sfnt_off0000610a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x610A 19760 bytes
SHA-256: 3dd044f6cb99390b2abd16cc391b8aed21630f8a5ceb97dab0a17be13ee0613f