Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb7e935e2d5b780…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 05:33:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: df12689605ee15d1e9d5c976ae617139 SHA-1: 6767752537a50a4368b8c3239e8c5f51499c6897 SHA-256: bcb7e935e2d5b7801131d16fc636ccc3a04e746ca4bca3782540ff870ba68a09
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector hosted on 'netcdn.online' which is associated with game hack lures. The document body also contains a call-to-action phrase and the primary URL, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection and lure tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-game-hack-app-download-game-hack In PDF document text
    • http://perpus.polbitrada.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/my-robux_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-com-redeem_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-rules_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-hack-apk-35-33_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-spin-link_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://perpus.polbitrada.ac.id/repository/pokemon-go-free-raid-pass_GM1094591345.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_off00005295.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5295 24676 bytes
SHA-256: b58df47f4e30e108c252e8f4abcfa408f3d063478dc25afb4c97420c888fa3dd
font_01_sfnt_off00008b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B72 18732 bytes
SHA-256: f404071305b689e90b7e8211e9e9c7c0bd06c22f48a22ec113b2942a02d780a2

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