Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b974a5ddea1f22…

MALICIOUS

PDF

31.5 KB Created: 2021-07-19 05:14:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 15217a61f9fefb8e8404670b6df6fdce SHA-1: af0e5f04e89c63f8eabc9d731adea197b1fb1513 SHA-256: e1b974a5ddea1f2206645cda2c1de797fc47f77bb193fda87208b8a27093d9a9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links to malicious redirectors, masquerading as game hacks and generators. The primary lure is 'Free Robux Discord', directing users to a known malicious domain. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for exploiting PDF vulnerabilities or redirecting users to malicious sites that may host further exploits or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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 http://netcdn.tw/app/431946152/free-robux-discord-game-hack In PDF document text
    • http://enjoybabelisland.com/images/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://enjoybabelisland.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://enjoybabelisland.com/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://enjoybabelisland.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://enjoybabelisland.com/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://enjoybabelisland.com/images/free-tiktok-likes-generator_GM835599320.pdfIn PDF document text
    • http://enjoybabelisland.com/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://enjoybabelisland.com/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://enjoybabelisland.com/images/how-to-get-free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://enjoybabelisland.com/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000027f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27F8 21808 bytes
SHA-256: b3e520634e5a990126e1350190ed9fa3419841543490b3f3bca7a15f70aa714a
font_01_sfnt_off000057f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F9 18660 bytes
SHA-256: d34f3ea799e9fe8770c2c4ca346860624244dc7d3ab504a825f1e5fbc601b08e

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