Malicious PDF — malware analysis report

Static analysis result for SHA-256 d722e9b11204d27a…

MALICIOUS

PDF

42.8 KB Created: 2021-05-13 16:31:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 456dea51ab264c007e9099f0dd095afd SHA-1: 29f9218dd556ade51e62d163fd46dc45980ff827 SHA-256: d722e9b11204d27af20d37c613750b0573d45378e02015a8ad351ab3fe70511e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as a 'free Robux generator'. The document body, though heavily obfuscated, contains text related to game hacks and generators, reinforcing the lure. The presence of multiple malicious redirector links indicates a high likelihood of this document being used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/free-robux-generator-2021-game-hack In PDF document text
    • http://calavera.be/images/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://calavera.be/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/robux-today_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-roblox-app_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/free-robux-real_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://calavera.be/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/hack-coin-master-32-mod-apk_GM406889139.pdfIn PDF document text
    • http://calavera.be/images/coin-master-cards-free-cards_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_off00004664.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4664 26820 bytes
SHA-256: a58f9fca49a222fa21fb78baec1ec96a5ec238c7e2c45c5f8553d1cfc575f956
font_01_sfnt_off0000835a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 18748 bytes
SHA-256: fca1806ffff7593a0a2d811b077fe14576afb362c0c2e8ffc695fbf8edc3964d

Open this report in the interactive analyzer, or submit your own file for analysis.