Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3a5cc538544fbdd…

MALICIOUS

PDF

32.0 KB Created: 2021-06-08 11:17:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b0a1531488e9bc54f39688ae44c455f SHA-1: cf307cd1d7959b236c2e9a7d31b35d34294cf866 SHA-256: a3a5cc538544fbdd7f22d8ad6127c6febb87ff4a84876c649e415f1b781dab8d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious domain, masquerading as a game hack or generator. The primary lure is a link promising free Robux, which is a common social engineering tactic. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a redirection chain designed to lead the user to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 3

  • 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.
  • 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.tw/app/431946152/how-to-get-free-robux-in-roblox-2021-not-clickbait-game-hack In PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/robux-giver_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/how-do-you-get-free-pet-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/atticus129-roblox-hacked_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/daily-free-spins_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/coin-free-master_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/mcpe-hack-client_GM479516143.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://e-learning.man2-kotapadang.sch.id/__statics/gudangsoal/files/free-robux-for-free_GM431946152.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005437.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5437 16744 bytes
SHA-256: a85f7d34377a12022b92e1017ea66ee37d6fff788e33a2141b789c37b19e8a12

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