Malicious PDF — malware analysis report

Static analysis result for SHA-256 d389503f5cfdd29a…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 17:20:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f436d9fbe3731565cbdcc03f0bca2747 SHA-1: 6ccca78b75dd0180c0dbc0928806ae5b167fe608 SHA-256: d389503f5cfdd29a3b04f029070202de68895e6382f5f04e77d0f04aa28fa78e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary redirector URL is http://netcdn.tw/app/479516143/minecraft-book-collection-game-hack, which is flagged as malicious. The document body also contains numerous other URLs pointing to similar lures, suggesting a phishing or scam campaign aimed at tricking users into downloading potentially harmful files. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a malicious intent to redirect users to malicious content.

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/479516143/minecraft-book-collection-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/secret-robux-hack-for-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/where-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-wins-in-anarchy-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-cheat-on-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-pubg-uc-free_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/no-human-verification-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_off00002ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC7 22260 bytes
SHA-256: ebd7d2fbd4bbdcca2492d6f9348fdfce22c6461f974ac3f4edc595249ab8e100
font_01_sfnt_off00006065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 18460 bytes
SHA-256: d4ee59d4009559a10760f1b4f681366fcc14c243429bee840e8cca7020b3171d

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