Malicious PDF — malware analysis report

Static analysis result for SHA-256 a03d76bfe2ac5c75…

MALICIOUS

PDF

52.8 KB Created: 2021-05-15 02:02:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 03e8a48e225e23653007454b17901a14 SHA-1: e5b472da8a84de2b41530866851e972e5f3cdb7f SHA-256: a03d76bfe2ac5c758c33d6658a03349a9776c4e47197f9508ff8319c87d52e27
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator' or 'game hack' lures. The primary redirector URL is https://netcdn.xyz/app/431946152/free-robux-by-watching-ads-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting potentially harmful sites, likely as a precursor to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9324

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-by-watching-ads-game-hack In PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-card-link-coin-master_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/get-coin-master-spins-free_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/robux-games_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-minecraft-server-hosting-24-7_GM479516143.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://bengkellaskita.com/new/public/ckfinder/userfiles/files/free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cfe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CFE 36924 bytes
SHA-256: 552d18e0528aeb0bf943de6054d54e0af87769044943cee34f0ca92c5c0a1d41
font_01_sfnt_off00009f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9F22 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000a8e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E4 19472 bytes
SHA-256: 06b7c2c04a08988b26013261e09f65c94c24f523f4ae9df4e6f4943f7c42b6f1

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