Malicious PDF — malware analysis report

Static analysis result for SHA-256 efc6ee775bc452a9…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 18:01:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0cb8acbe1e9da1e516b4593f1ac9d4ab SHA-1: 02f561bda1d77e6d09901ebf21570eeed44d8fcc SHA-256: efc6ee775bc452a9d5e0a859ab9619f98f847efcf1d375955c46e02d9979d106
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game hacks and currency generators. The primary redirect URL is https://netcdn.xyz/app/431946152/free-robux-no-verification-required-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering lure to drive users to potentially malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/free-robux-no-verification-required-game-hack In PDF document text
    • http://www.drent.se/images/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/robux-gainer_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-tiradas-gratis-2021_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-bedrock-download_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-roblox-codes_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-minecraft-generator_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
font_00_sfnt_off00004756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4756 27484 bytes
SHA-256: 164674e3594459d50e456ade15f18ee0074d22ee95af104ad4a85e31890342ae
font_01_sfnt_off000084b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B3 18944 bytes
SHA-256: 3e075e77f873d88a985ea69ac7fafb934745d76ebabdb09bc56e33f005972947

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