Malicious PDF — malware analysis report

Static analysis result for SHA-256 641708fd6843fb2d…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 20:09:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 49490bd48437e4c5410527cdaa088436 SHA-1: 8ea348cb897d465afcb8754ab79d6d0ae0344cb7 SHA-256: 641708fd6843fb2dfb32b9450fb083149a55ba9515c451dd1aa84a7e2f592390
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs, including one that redirects to a 'Roblox Hack Menu' lure. This lure, along with other similar links, points to malicious redirector infrastructure. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent. The document's primary function appears to be directing users to potentially harmful content or further malicious downloads.

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-hack-menu-2021-game-hack In PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-make-your-own-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-give-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/como-hackear-roblox-para-tener-robux-facil_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-pokemon-go-joystick-2021_GM1094591345.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/hacks-for-dragon-ball-burst-roblox_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/minecraft-free-app_GM479516143.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/roblox-robux_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-use-cheat-engine-on-roblox-high-school_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/pokemon-go-free-yellow-team_GM1094591345.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/how-to-earn-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://www.manchieu.vn/upload/editor/files/can-u-get-free-robux_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
font_00_sfnt_off00003025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3025 22308 bytes
SHA-256: f244271dfa19af50e7487fd91d6990be1f3a37e9cda39c7ef447eaa84eb92602
font_01_sfnt_off000061b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61B4 19392 bytes
SHA-256: ff5fbe22b0fe0a6fd871bd407160007091193243f11f80fec527a4ecf6bf4f6b