Malicious PDF — malware analysis report

Static analysis result for SHA-256 8678f6160cb507d3…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 21:03:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9b226c111bda99afe42d403dc1aa4bca SHA-1: a5ba71d799b60e7dc42255067dc014c8c42ce0c8 SHA-256: 8678f6160cb507d390de071cec151978fa6f4f3c439e7854e51621ffea420a6a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/free-robux-codes-site-game-hack, is associated with known malicious redirector infrastructure. The document's content and multiple embedded URLs suggest a phishing or scam attempt aimed at driving traffic to potentially malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/free-robux-codes-site-game-hack In PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-demon_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-hack-srf-15a-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-counter-hack-a-hacker-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-minecraft-java-edition-codes_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-hack-people-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-hack-no-verification-no-signup_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-spins-2021-app_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-script-hack_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-spin-cheat_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
stream_002_off00002d43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D43 22940 bytes
SHA-256: d971ac2febadfe2b5c3935700393e88ffb36d9515c2b48b05fe35e31ecf4edc9
font_01_sfnt_off000060db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DB 19112 bytes
SHA-256: 3e3502501db573da59f463c534528f2f00999f97d79606010b59eeba2167cd09