Malicious PDF — malware analysis report

Static analysis result for SHA-256 4305708bc750627a…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 21:59:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 367226e8046fbbcfb204c79ec934fd09 SHA-1: 756cc9f70b33eab18243bcfe0b261094fbe98440 SHA-256: 4305708bc750627a1f0f6b5ebee73bdafd8259a781b9f875a5f60ed874af77d9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure for free game currency ('Robux') and game hacks, directing users to a known malicious redirector. The document body contains obfuscated text and multiple URLs, including the primary malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at driving traffic to potentially malicious sites, likely for credential harvesting or further malware delivery.

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/earn-free-robux-on-roblox-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-without-paying-money-or-typing-password_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-for-unboxing-simulator-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-robux-for-free-no-human-verification-ipad_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-now_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-easy-on-iphone_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-waterpark-noodle-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-coins-and-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-clothes-creator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-cheats-discord_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/codes-for-hacking-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/tiktok-get-free-followers_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-com_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_off00003083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3083 21992 bytes
SHA-256: eb2259c31cde20a24951d669249b863ba017052c2337d5730fe3134d805ce1dc
font_01_sfnt_off00006117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6117 18788 bytes
SHA-256: af3555bc1f517b69886570aade67a9791766090da4e1e41d0d69d2926e00b478

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