Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d8ec7ac2d9b1a3f…

MALICIOUS

PDF

45.0 KB Created: 2021-06-09 15:33:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 872e5d071542007365c68a8c18303ec7 SHA-1: c80e714e7f5c0a8b8d349ba471fba7b69cb22613 SHA-256: 3d8ec7ac2d9b1a3f3d172e65a37914fa8a52c14b75c4ff9fa9cb1538bc59b958
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting game hacks and free currency. The primary link, 'https://netcdn.tw/app/431946152/roblox-jailbreak-hack-infinite-rob-cash-game-hack', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to game hacks and URLs, reinforcing the lure. No scripts were extracted, but the presence of multiple malicious links indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.tw/app/431946152/roblox-jailbreak-hack-infinite-rob-cash-game-hack In PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/hackear-coin-master-sin-verificacion_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-hacking-jailbreak-unlimited-money-omg_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/are-tiktok-free-views-without-verification_GM835599320.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-c9m_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-hack-2021-ios-download_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-roblox-clothes-templates_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://digilib.stimata.ac.id/repository/how-to-get-free-robux-on-jailbreak_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_off000050d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50D8 25892 bytes
SHA-256: 2ca1fd778685edf3b61edaebc8f10381a1732e4984b8ab80257f3a63264a385d
font_01_sfnt_off00008bfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFC 18740 bytes
SHA-256: 4bbf6a69878fc6df1f20be456cbe3554f425f3e4b1afe3685e3d5033f51fa672

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