Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b605f513bc0902c…

MALICIOUS

PDF

46.2 KB Created: 2021-05-15 16:39:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: af55896123605d100c1a2a3dc398ab0a SHA-1: b453c4bfe9d173627a58e685570041843d381204 SHA-256: 8b605f513bc0902c1610cd308e98750493e6c39c41ae5d3c98f1f63c2eb59dab
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded URLs and a heuristic firing for an external URI, indicating an attempt to redirect the user to a malicious download site. The document body, though heavily obfuscated, contains references to game-related lures like 'Roblox Premium Free' and 'free game hack', suggesting a social engineering tactic. The ML classifier also flagged the PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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-premium-free-game-hack In PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-spins-coin-master-apple_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-free-download-android-apk_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/get-free-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/www-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-watch-ads-for-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC1 25564 bytes
SHA-256: f488f07ae68dcde9f7ef154be6e2c3089a794b031be2fb59a06ffcc815f89144
font_01_sfnt_off000084fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FC 3464 bytes
SHA-256: 8e24205afdd13dcdea98f8150ef77dee4030e0e50a7c748783d1b4598e034a20
font_02_sfnt_off00009132.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9132 18620 bytes
SHA-256: 29b072d58d5b3a55b665a3fffae90f40690866f16f9b518bc51084b043f759b6

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