Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa38ea529def36a3…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 03:23:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a48be651fbbaf32fb84e58b985d56fde SHA-1: e6fe7e356e4d784a7ed22cb4a9776baaa6338503 SHA-256: aa38ea529def36a360645d7c4910774f6b16fb7bfd593f9dd6c851458ee678f8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free in-game currency, specifically targeting Roblox and Minecraft. It contains embedded links that direct users to a known malicious redirector infrastructure, likely to facilitate further malicious activity such as malware delivery or phishing. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.co/app/431946152/how-to-hack-your-robux-on-roblox-game-hack In PDF document text
    • https://jas8.com.tw/image/data/files/roblox-hack-robux-game-you-achley-get-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/magitan-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-free-robux-march-2021_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-the-snowman-package-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-minecraft-packs_GM479516143.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/village-4-coin-master_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/roblox-robux-hacks-for-free-robux_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/coin-master-free-spins-link-2021-iphone_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://jas8.com.tw/image/data/files/free-robux-no-verification-or-survey-2021_GM431946152.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_off00002f91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F91 22196 bytes
SHA-256: 434bd1a2cbd76486136c93db30f48af71c9d2f98eb056847cdca412adaadd2ef
font_01_sfnt_off0000604f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x604F 19120 bytes
SHA-256: 05a999ee1319c546bf6d7f740849e4ac41f500bc4072f10a07a11bf439c149fa

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