Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9500ab5a0796cab…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 23:26:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e3742a1ac49041ed52be0f129bf40d2a SHA-1: dc512499221faf99e40fd3c32f660f16f25a8313 SHA-256: b9500ab5a0796cab5b2a69b9bbe436868455775699925ad1f9effea3c034c226
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirector lure, pointing to a URL that likely hosts a malicious payload. The document body, though partially corrupted, contains the same lure text and URL. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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/406889139/coin-master-2021-free-spins-link-2021-game-hack In PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-no-taks_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/are-free-robux-real_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-on-roblox-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-hack-free-download_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-vpn-for-minecraft_GM479516143.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-hack-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-da-hood-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-project-pokemon-duplication-hack_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-visual-studio-roblox-exploit-template_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-murder-mystery-2-on-roblox-with-nopdengine_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-all-gamepasses-for-free_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.akafarma-aceh.ac.id/repository/denis-free-robux-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C1 22280 bytes
SHA-256: 21f797dd5e0cd4a3ac40400a5d0d5b3d5b415aa18396874273f74c93de54d6d4
font_01_sfnt_off0000638d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638D 18748 bytes
SHA-256: e86d1d7b2a315a4589de0526ea833c85a652b2f2cf198d952b17ceb10db4042d

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