Malicious PDF — malware analysis report

Static analysis result for SHA-256 4821513cd3029237…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 09:17:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: dd10a5b89f17508652df81893bdfd439 SHA-1: 2f1c2f89b3f6e78e40a7cf0117bf8efcb07754b9 SHA-256: 4821513cd30292378df0760cac361fbba9b83be94a8b45aa05eb5365fe80651f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, masquerading as game hacks. The primary lure URL is https://netcdn.tw/app/431946152/free-naruto-headband-roblox-game-hack, which is designed to trick users into clicking through to potentially harmful content. The document body and embedded links strongly suggest a social engineering tactic to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/free-naruto-headband-roblox-game-hack In PDF document text
    • http://www.art-concept.gr/images/www-rbxhut-com_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/free-robux-no-info_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-command-prompt-hack_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/free-roblox-combat-scripts-for-studio_GM431946152.pdfIn PDF document text
    • http://www.art-concept.gr/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/earn-free-robux-for-roblox-robloxwin_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-drunk-walk-cheat-engine_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/fight-the-monsters-roblox-hack_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/get-free-800-robux_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/how-to-change-name-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.art-concept.gr/images/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.art-concept.gr/images/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-money-hack-2021_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/how-to-get-the-mew-game-pass-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.art-concept.gr/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://art-concept.gr/images/roblox-free-play-bloxburg_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/change-money-in-roblox-using-cheat-engine_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/good-hacking-site-for-roblox_GM431946152.pdfIn PDF document text
    • https://art-concept.gr/images/hacks-para-roblox-2021-may-cualquier-juego_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
stream_004_off000053c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C4 24920 bytes
SHA-256: 17e888c151990aff4656f852242705f0d9645875caa5b9b82e1db2625e231859
font_01_sfnt_off00008d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D58 18592 bytes
SHA-256: 54bbf1d5e187aa90dc4c3ef0ef39488bd8a9692a42107189f53ea6fb71a2acb3