Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6351a15c1f7b1b…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 07:45:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6a3d2018e69a8ad1dce2b8778e1e1a0b SHA-1: 4246c19b2b70a81e0d33594b820e2be1000fdbe4 SHA-256: dd6351a15c1f7b1b4fd0015f25340a0cb10dbf0262bdc4536b89eb863f36ca05
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks and generators. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a workflow designed to redirect users to potentially harmful content or initiate downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/free-roblox-valentines-cards-game-hack In PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/hacks-for-roblox-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/tiktok-viewer-free_GM835599320.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/admin-command-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-roblox-catolog-items-may-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/distork-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/como-hackearle-la-cuenta-a-alguien-en-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mtsnlingga.sch.id/__statics/gudangsoal/files/free-minecraft-java-edition_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
stream_004_off0000522e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522E 25428 bytes
SHA-256: 68e62fb027a5e191d2c3dd79c3ada6a1b4943a46eb9a0c1d4baed2d1b4ad183b
font_01_sfnt_off00008d53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D53 18708 bytes
SHA-256: 5ee406aa7c726fdfa9250be4c461f99997589b565acdafef01f779015c85e9fe

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