Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53ba2d8049870e3…

MALICIOUS

PDF

35.1 KB Created: 2021-07-03 19:12:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1e596a96cb7a867403655070fba4e8b1 SHA-1: 414dc1ff5d367c8cf2120eb53886268c4cca9df7 SHA-256: d53ba2d8049870e31f0cae3fae893574012e4aaf86ad24e9a80cc3b96e435e28
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector at http://netcdn.tw/app/431946152/how-to-get-free-roblox-premium-game-hack. The document body and embedded URLs suggest a lure for game-related cheats or hacks, a common tactic for phishing or malware distribution. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a high likelihood of leading users to a malicious site.

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/how-to-get-free-roblox-premium-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/dominous-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pubg-uc-quiz_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-make-cheat-engine-undetected-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pokemon-go-free-9db_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-u-get-robux-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-hats-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-how-to-hack-grand-blox-auto-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-backpack-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacks-para-los-juegos-de-roblox-gratis_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/is-coin-master-hacks-safe_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-codes-no-download_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_off00002e3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3C 23168 bytes
SHA-256: 4dad14d6b3f160afe46cd1d6079c972794870b5ce127ffed94c0016f26ecea1a
font_01_sfnt_off000062b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B8 19592 bytes
SHA-256: 8b1b51e6228fdc9650fa24152b1b7f272427408116855cfdbd7c3d0194f83bbd

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