Malicious PDF — malware analysis report

Static analysis result for SHA-256 f861bb26e091f875…

MALICIOUS

PDF

35.4 KB Created: 2021-07-04 14:31:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 534a3cc92cb712187ed1caf5f83f65c2 SHA-1: 16d2158d13a9f2c1a5fc1712566bae8168d17d8d SHA-256: f861bb26e091f8757211a78ac7d21deaf90270e6604f4e8466c9ae24af51cfec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure for free game currency or hacks, directing users to a known malicious redirector. The embedded URL, http://netcdn.tw/app/431946152/free-robux-discord-servers-2021-game-hack, is associated with malicious redirector infrastructure. The document's content and heuristics strongly suggest a phishing or scam attempt designed to lead users to potentially harmful sites.

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.tw/app/431946152/free-robux-discord-servers-2021-game-hack In PDF document text
    • https://digilib.stimlog.ac.id/repository/nuevo-hack-para-dragon-ball-rage-cesarius-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/wall-hack-cs-go-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/script-fly-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/dominus-rex-for-free-roblox-extreme-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-a-roblox-account-quick_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hacks-murder-mystery-2_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-community-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/when-was-minecraft-free_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/cheats-for-snow-shovelling-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/awesome-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-pokemon-t-shirts-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-daily-spin-free_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
font_00_sfnt_off00003109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3109 22444 bytes
SHA-256: a768d3115a509118a43a2a1d84809d8cb94fa2239e2f7bd1e3044f7f97634821
font_01_sfnt_off00006347.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6347 19692 bytes
SHA-256: 62d1e6434340c29724d03a40ff0c148c9cc03cb095be97a7ed3692c7338e83f3

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