Malicious PDF — malware analysis report

Static analysis result for SHA-256 276c4a12cecc80ee…

MALICIOUS

PDF

223.6 KB Created: 2021-07-05 08:11:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b5ceed681163240159294a2a18b1827d SHA-1: ef4c9b2609fff5878c983c90e335c68a4a0569b0 SHA-256: 276c4a12cecc80ee7e16dcbaf6e05f42279adb029089c0b5faa5e30de6e17a26
122 Risk Score

Malware Insights

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

The PDF file contains multiple links that redirect to known malicious infrastructure, specifically advertising a 'Pokemon Go Free Kanto Ticket Game Hack'. The document body, though partially corrupted, contains text related to this lure and the authoring application. The primary attack vector appears to be social engineering via a deceptive link, leading to a malicious redirector.

Machine Learning

  • Nyx PDF Classifier clean score 0.1128

Heuristics 3

  • 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.
  • 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/1094591345/pokemon-go-free-kanto-ticket-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/robux-2021-free_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/static-moonactive-net-rewards_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-apk-download-016-0_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-spin-coin-master-link-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/optifine-mcpe_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/pokemon-go-free-rare-candy_GM1094591345.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/como-hackear-una-cuenta-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-spins-on-coin-master_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
stream_023_off0003205c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3205C 25576 bytes
SHA-256: c75f207b2cbad94bbf8e24ebb26086978f29acc4e41e90385b76b9cd783f8b66
stream_024_off00035c59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C59 18584 bytes
SHA-256: 19111b01c213a1e7c9957e7a96754d4585f9300c945a4e706f29478341d9b295

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