Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f851f973557665…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 21:08:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fd2eb4cc0d8f87ba9ddb61ab8993779f SHA-1: c81f3b91f9702fb68c5e45991bd2e6c5e899c097 SHA-256: 92f851f9735576653488fc6898030c1a170d562e07b98accf4593f94c95c9ea3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to what is identified as malicious redirector infrastructure, specifically promoting 'free game hacks' and 'free robux'. The document body, though partially corrupted, contains similar lures and embedded URLs. The primary function appears to be directing users to potentially harmful websites, likely for further exploitation or malware delivery.

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-german-flag-tshirt-free-game-hack In PDF document text
    • http://lib.smklabor.sch.id/repository/youtube-denis-daily-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-livestreams_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/contact-roblox-account-hacked_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/citizen-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-hack-roblox-jailbreak-keycard_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-hack-2021-pc_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-studio-free-templates_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-capes-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-april-2021_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-aimbot_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-xray-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_off00003286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3286 22672 bytes
SHA-256: 06ff23d07487a3af8e08856c04fc3bc3431b74c396c2bbe8ad4ccb42eba32358
font_01_sfnt_off00006553.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6553 19300 bytes
SHA-256: 291bdee7ec84159afafe2fd6ffadfbdaa946359118189cacbbb50ff5546bc415