Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb5fe4257345b275…

MALICIOUS

PDF

43.7 KB Created: 2021-05-20 00:00:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 64b138b9fd1caf3f4e1e3f9b73745747 SHA-1: 581898f04ef65a7e2d272caa4deb6849db949e81 SHA-256: fb5fe4257345b275d6570c2096080665b6ef456c293b3a32f7edb7a1648f8595
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and generators, such as 'roblox-studio-free-download-game-hack'. These links are flagged as malicious redirectors, indicating a phishing or scam attempt. The document body and heuristics confirm the lure is related to free game items, aiming to trick users into visiting these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/431946152/roblox-studio-free-download-game-hack In PDF document text
    • http://papelesyempaques.co/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://papelesyempaques.co/images/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://papelesyempaques.co/images/pubg-800-uc_GM1330123889.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-500-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • http://papelesyempaques.co/images/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/coin-master-hack-blogspot_GM406889139.pdfIn PDF document text
    • http://papelesyempaques.co/images/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://papelesyempaques.co/images/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://papelesyempaques.co/images/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48EC 26224 bytes
SHA-256: 0fbb32d0695d63a42d0826ec0a7dc1f6f8db1f7e880338294af7bf8e50343500
font_01_sfnt_off00008600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8600 19048 bytes
SHA-256: 285731f73243192995ef55c7bff5b12d0277a9b461a1d4b1bbd56785699d0c43

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