Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0957998a52d0ddc…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 16:16:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1f2713c08ff8a3b87d69463bd65efc0a SHA-1: c2d8183db082302f786368331c2eda00c6496313 SHA-256: c0957998a52d0ddce9f73eaf562144acd482f1f25ed4bd4688e572c588a0720b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as offers for free game hacks and currency. The primary malicious URL identified is https://netcdn.online/app/431946152/free-robux-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a redirection-based attack, likely intended to lead users to phishing or malware download sites.

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.online/app/431946152/free-robux-for-free-game-hack In PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-how-to-get-free-pet-food_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-windows-10-key-free_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/pokemon-go-free-remote-raid-pass_GM1094591345.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-spin-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/is-minecraft-free-on-xbox_GM479516143.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_004_off000050a7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A7 27900 bytes
SHA-256: 594793fa675abf226b927565387b35cf65f2ed9a645897627339bf167d791ceb
font_01_sfnt_off00008ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FFA 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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