Malicious PDF — malware analysis report

Static analysis result for SHA-256 d304e6f6c8e2d52b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 16:35:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 864bff623e379bfeb727fdda71b77f6d SHA-1: c87c2ff50f81ca5d87d0cb35f7a61fef4af98245 SHA-256: d304e6f6c8e2d52b96baf94d99604f481e64123c3caa05f29f4e7b3bfca45864
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, with a primary focus on 'free generator / game hack' lures. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary URL, http://netcdn.co/app/431946152/hackear-roblox-server-game-hack, is known malicious redirector infrastructure. The document body and heuristics suggest a social engineering tactic to trick users into clicking malicious links, likely leading to malware download or credential harvesting. No scripts were extracted from this sample.

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/hackear-roblox-server-game-hack In PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/how-to-hack-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-roblox-gear_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-arcane-adventures-cheats_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/husky-800m-free-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-for-real-no-human-verification_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/pubg-uc-10-rs_GM1330123889.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/hack-a-game_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-hacker-june-28_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-shirt-texture-free-shipping_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/roblox-breaking-point-hacks_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-codes-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://vosco.vn/uploads/vosco.vn/files/minecraft-fly-hack_GM479516143.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_off000031c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C2 22568 bytes
SHA-256: d7d88c5d0e77385a8931cb7bfe402d913abb7405d5e6240c6b88e24ae77a1172
font_01_sfnt_off000063f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F3 18768 bytes
SHA-256: 61bc8d288e3ef86de0dc9edca090eea9a0d56a6adbb470d20af7652c69069132