Malicious PDF — malware analysis report

Static analysis result for SHA-256 e786bf23a0599004…

MALICIOUS

PDF

44.9 KB Created: 2021-06-08 23:47:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e473c614dabc41cc6565d6960a589f18 SHA-1: 151e0811bf33e7a93da54f78826cd243ad80a43a SHA-256: e786bf23a0599004c1ed716c856b1f116c0c4f6ce91ffff4fc2a956a7fbcb6b7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as generators for in-game currency like Robux and Minecraft hacks. The document body and embedded URLs strongly suggest a phishing or scam attempt to lure users to potentially malicious websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-generator-no-survey-or-human-verification-2021-pc-game-hack In PDF document text
    • http://gruporamos.do/images/free-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/pubg-uc-hack-app_GM1330123889.pdfIn PDF document text
    • http://gruporamos.do/images/free-empty-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-earn-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-java-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-education-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://gruporamos.do/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://gruporamos.do/images/how-to-get-free-robux-in-2021_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
stream_004_off0000506b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x506B 24396 bytes
SHA-256: d6d00750dc8a6a32b07e2c4a670adcc05be8b86c4d162a7d9608e50eaf6231a7
font_01_sfnt_off0000887e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x887E 19712 bytes
SHA-256: 7308c659928fb36fbfb0f923560c96062b37801bca51701751deb307306ae06a

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