Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc5d465fffc01ca…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 10:58:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8882cbb235fdf311ab42defd9ab2cc01 SHA-1: 6a0991a5452876f19c83d5d6e1d03acafcd06e41 SHA-256: 8dc5d465fffc01ca6304eee0167e3fd94673ed7524c86c7cc1e87225c0f34d9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector domains, masquerading as game hacks and free currency generators. These links, such as http://netcdn.co/app/431946152/roblox-field-of-battle-hack-game-hack, are flagged as malicious and likely lead to further malicious content or phishing pages. The ML classifier also strongly indicated maliciousness, supporting the conclusion that this document is part of a social engineering campaign.

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-field-of-battle-hack-game-hack In PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/free-gifts-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-spin-ml-link_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-how-to-create-a-group-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/2021-best-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/minecraft-free-download-mac_GM479516143.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com//repository/hack-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://pustaka-smpn3tpi.com/repository/coin-master-link_GM406889139.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
stream_002_off00002e94.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E94 22728 bytes
SHA-256: 8e1f6844c54fccd85898a12d5b3ce91dad875a07505064cd9c188816f3a523c0
font_01_sfnt_off00006170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6170 19220 bytes
SHA-256: 366f6aea05b77200488148e73bc7cabff95b3b2e118d39c71bc9bb2c02df19e6

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