Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ca2a82f65b26b3…

MALICIOUS

PDF

34.2 KB Created: 2021-07-06 08:25:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: db71705ea3a000d7200a3765f989b273 SHA-1: 6ac1a9d07921eedaa77296850aeaee00102de37d SHA-256: 11ca2a82f65b26b3d3427e4697aa0b58bc2e6f0f45b890c439dcf718e068d7ef
160 Risk Score

Malware Insights

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

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary malicious URL identified is http://netcdn.tw/app/431946152/robux-no-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit user interest in game-related cheats to lead them to potentially harmful content or further exploits.

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.tw/app/431946152/robux-no-verification-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/los-hacker-de-roblox-mas-peligrosos_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-mad-city-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-hackear-cuentas-de-roblox-espaol_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-wheel_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-shirt-creator-free-shipping_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/all-roblox-dance-hacks_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/10-dollar-roblox-card-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/cool-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/mistplay-hack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-earner_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-acounta-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/can-you-cheat-to-get-money-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.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_off00003032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3032 21976 bytes
SHA-256: d957e11de0702632e72524714c371bab0833d5565235ddfa4bab9ebd3bce6bca
font_01_sfnt_off000060b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B7 18912 bytes
SHA-256: 5371eeb4f32645909a106e2314d3e19630680129b8a7356391e2a50deb7f8a6b

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