Malicious PDF — malware analysis report

Static analysis result for SHA-256 99ec273b040cc413…

MALICIOUS

PDF

45.6 KB Created: 2021-05-17 19:34:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 52b4aebc0918df87089bf20ff41aa032 SHA-1: 6472aa6b4b29a85df88afe236053036be3a9d198 SHA-256: 99ec273b040cc4130ee8e0ae7f9f376231db08e1faaa6d93b990f780bc4c4807
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on a game hack generator, which redirects to malicious infrastructure. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/406889139/hack-coin-master-ios-game-hack In PDF document text
    • http://waldkindergarten-abensberg.de/images/are-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/free-spin-online-tool-coin-master_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://waldkindergarten-abensberg.de/images/how-to-get-free-followers-on-roblox_GM431946152.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_off00004f86.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F86 25384 bytes
SHA-256: bc216629dcccec5af881bc889ce70f0a8c43121b660510f5723b904ac4d1cc9d
font_01_sfnt_off00008762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8762 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000914c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914C 17716 bytes
SHA-256: 4e3a035fcc4d7e34a70bc1936180ad88d62d1a278a85b436915b1920e97724ff

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