Malicious PDF — malware analysis report

Static analysis result for SHA-256 5590ef899d7cd648…

MALICIOUS

PDF

35.4 KB Created: 2021-06-27 04:47:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fb54dc5790db43a1fbdc0ed6e730d42c SHA-1: 908f7944376a902a7b6d5553c1afafd6da13a078 SHA-256: 5590ef899d7cd648344ed72db4834692c27f109f0d8d3c1b01f65f55eb826d64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector, disguised as game hacks and generators for popular games like Roblox. The heuristic firings indicate that the document is designed to lure users into clicking these links, which likely lead to further malicious content or exploits. No scripts were extracted, but the embedded URLs and redirector heuristics strongly suggest a phishing or malware distribution attempt.

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-bad-behaviour-game-hack In PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/free-roblox-accounts-2021-september_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/muscle-simulater-roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/free-robux-generator-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/hack-roblox-jailbreak-2021-mega_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/gaming-app-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-titanic-free-radi-ov3rmillion_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-lumber-tycoon-2-free-land_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/app-hack-online-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/free-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/free-giveaway-robux_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/free-rpg-roblox_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/how-to-get-free-stuff-in-roblox-dragon-riders_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-lab-experiment-hacks_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/roblox-sir-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • https://www.elearning.madupurwogondo.sch.id/__statics/gudangsoal/files/tiktok-minecraft-hacks_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_off00003205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3205 22544 bytes
SHA-256: ce12a2cf0eaa631b671ffa3997639b249f7ad0993552c93354d074fd398e35c6
font_01_sfnt_off0000645e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645E 19368 bytes
SHA-256: dcdc02a7d700a292815bfc4250434452e7ceff45414ca2b3833d85bc5fad40b6

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