Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd9cf80345bbc880…

MALICIOUS

PDF

35.0 KB Created: 2021-06-29 13:50:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 66a1f4b3af39a2840bbc7f4d4b99b774 SHA-1: dfd7f0bce5a870289550901856f1c86f7b46164c SHA-256: dd9cf80345bbc880ffc3dd46ac6d70ae2c881994a85cc9387bc3d258e672fdcf
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 'Roblox Cheats' and 'Game Hacks'. The primary lure URL is http://netcdn.co/app/431946152/roblox-cheats-for-robux-and-tix-2021-game-hack, which is flagged as a malicious redirector. The document's content and embedded URLs strongly suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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/roblox-cheats-for-robux-and-tix-2021-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/admin-roblox-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-back-your-account-from-a-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-do-speed-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/todays-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/get-free-dominus-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/pastebin-link-for-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-live-giveaway-group_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hack-with-no-virus-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/boku-no-roblox-hack-quirk-vermillion_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hacks-for-roblox-gods-of-elements-rota_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/flying-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-promo-codes-2021-may_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/guess-that-song-game-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/how-to-get-everything-free-on-roblox-2021-april_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_off00002f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F06 22588 bytes
SHA-256: ef68a0d0b4808cde3009089e156475e6e1811ee064802d5783ed1c3b398d609b
font_01_sfnt_off00006174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 19756 bytes
SHA-256: a0a8f019211e9bf7e4701fad222142244ebfbc9453dd80e328a5f17f6a7d3373

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