Malicious PDF — malware analysis report

Static analysis result for SHA-256 828d06359e73edf0…

MALICIOUS

PDF

41.0 KB Created: 2021-05-12 00:34:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a42891ae8e6c08260e736e02d9c297a5 SHA-1: 735b1ff64e93e27b5c777d10e5abbc2b7d7b3b14 SHA-256: 828d06359e73edf0333888b42817516755d53a04349974654b63038f19777bd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as 'game hacks' and 'free trials' for popular games. The ML classifier also flagged this PDF as malicious. The presence of these links strongly suggests an attempt to redirect the user to a site that will host a malicious payload or conduct a phishing attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/479516143/minecraft-realms-free-trial-game-hack In PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/roblox-royale-high-diamond-hack_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-levels_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/minecraft-java-code-free_GM479516143.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-spins-ios-app_GM406889139.pdfIn PDF document text
    • http://pustaka1.unindra.id/repository/coin-master-free-soins_GM406889139.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_003_off000047ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47AE 24232 bytes
SHA-256: 42f25e18c02809b4bff29768f5ad3cba3d967d4245510eaea6155beb0496d02c
font_01_sfnt_off00007f16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F16 17900 bytes
SHA-256: 5e9e7e4dd5050dedb25c4bef302629088f41d3cb5f82066cb4e6c0f6a9bca7dc

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