Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bc9c94a949f3f5…

MALICIOUS

PDF

34.1 KB Created: 2021-06-20 19:06:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 38dc14ea61046488db5529dbe4c65f7b SHA-1: e1069fa68aa23dfea8e9c36940ada7e5789fa873 SHA-256: 74bc9c94a949f3f59b6db76d223537253a96cd3f4d05d916bbc10208156f8a20
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising free game hacks and generators for popular games like Roblox and Coin Master. The primary lure URL, http://netcdn.co/app/431946152/costume-roblox-free-game-hack, is flagged as malicious. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely for further malware delivery or credential harvesting.

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/costume-roblox-free-game-hack In PDF document text
    • http://guimaq.com.br/images/bear-face-mask-roblox-free_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-get-a-hacked-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-100-real_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/roblox-hack-no-scam_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-disney-plus-accounts-tiktok_GM835599320.pdfIn PDF document text
    • http://guimaq.com.br/images/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/free-followers-for-tiktok_GM835599320.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://guimaq.com.br/images/free-robux-mod_GM431946152.pdfIn PDF document text
    • http://guimaq.com.br/images/roblox-free-wad-exploit_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_off00002d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D97 22552 bytes
SHA-256: 6f6a64e3b498a77c163091aaae3d1866a6f0f5484097572d5fce97212710525c
font_01_sfnt_off00005fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 19152 bytes
SHA-256: 323ab4bbf974ffb49980f354c62e7d8ff6f1b5b45495e970a117496444857e11

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