Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd2a0e4861a8cb46…

MALICIOUS

PDF

46.2 KB Created: 2021-05-16 04:01:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fc4d45ae716c88fe258fc149a5a70a30 SHA-1: 73904e18b3a8544ce427de835989f1dfb48860d1 SHA-256: bd2a0e4861a8cb468441e473f6f6fd4c6aa9f18df723acef73630248d5dc4cc9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and lures users with promises of free game currency or hacks. The primary malicious link identified is https://netcdn.xyz/app/431946152/free-robux-for-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to malicious sites, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-for-free-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-tool-access-online-generator_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-with-facebook-login_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/minecraft-windows-10-mod-menu_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_off000048f6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48F6 27796 bytes
SHA-256: f75dd2b5432c46b3c4d9709a3d4922b8877a653e0b631c4b5d4d451d4fd68ee7
font_01_sfnt_off00008921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8921 2880 bytes
SHA-256: 106de1d187d148d03f5c34a802444a7e62d93662ddf359d17cd55770c6c16081
font_02_sfnt_off00009311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9311 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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