Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b59358457ae591a…

MALICIOUS

PDF

35.1 KB Created: 2021-06-19 03:10:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2d928d1ec3f048727c642e2bd5c23bdb SHA-1: 6ef3ef515b0949cbd0b3e9e7aad9826f785ccc3b SHA-256: 1b59358457ae591aede2d99793534690ee51697a483ed2ae036a70381aaa3694
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains embedded URLs that lead to a known malicious redirector infrastructure, disguised as game hack generators. The document body and heuristics indicate a lure to trick users into clicking these links, likely to download further malware or engage in phishing. No scripts were extracted, but the presence of malicious redirector links is a strong indicator of malicious intent.

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.co/app/431946152/cheat-codes-for-roblox-2-player-gun-factory-tycoon-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/download-roblox-music-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/como-recuperar-una-cuenta-de-roblox-hackeada_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-avatar-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/who-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/mcpe-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/unpatchable-free-robux-made-by-robuxian_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_off00002f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F99 22556 bytes
SHA-256: 461ba8e4d2cd1118bcde4489d5a8d5ff91fa94fcbb6410a51bee06ad60c14068
font_01_sfnt_off00006217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6217 19692 bytes
SHA-256: e8840615d6e5b0b9453504bb942ad91bc72620f3acc185b4fd4ada337d0d6909

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