Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea28e187171d2470…

MALICIOUS

PDF

33.8 KB Created: 2021-06-30 22:17:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 11c6696e6b032c6de6e605c385db59b7 SHA-1: 6fcb0ad54336569af6aca241fc085a54335f82f6 SHA-256: ea28e187171d24708c64225b9ffcb2084d945515eb0738b50235be7a3bd86512
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering 'free Robux' or game hacks, a common lure for malicious content. The heuristic firings confirm these links point to known malicious redirectors and a general ML classifier flagged the document as malicious. The document body text explicitly mentions 'Free Robux For Sale' and includes a call to action, reinforcing the phishing pretext.

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/free-robux-for-sale-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-no-inspect-element-no-wait_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/easy-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-face-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-a380-free-model_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-how-to-get-private-server-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-games-free-play-now_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-800-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/btools-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/corn-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-hacks-no-install_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-pokemon-brick-bronze-shiny-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-computer-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/why-am-i-a-cheater-in-roblox-parkour_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-earn_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_off00002d8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8F 22452 bytes
SHA-256: acdb757cbfd7786012d7bec41e06ca2230b4b46a5a132f5226e8ed39dba39ef0
font_01_sfnt_off00005fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB3 18788 bytes
SHA-256: 1108ca3dddc117bb2b33604eecceeb7a9a7e902cc048d87e4e8b2d2374417a7c