Malicious PDF — malware analysis report

Static analysis result for SHA-256 b766825fb6e479bc…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 04:30:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d65fa074f2f1bdccc623573a74111b2c SHA-1: 0d127be189845153dc240bfab3b1a79b5a825f13 SHA-256: b766825fb6e479bc176be947f77d6f1459e4e4bdc1a9f70651df3da3773d3b65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising free game hacks and currency. The primary lure is the promise of 'free Robux' or game cheats, designed to entice users to click the malicious URL. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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.tw/app/431946152/free-robux-rewards-game-hack In PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-hack-roblox-2021-april_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/https-enhelprobloxcom-hc-enus-articles-202120210myaccountwashacked_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/piano-player-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-load-cheat-scripts-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-hack-into-any-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-hack-roblox-app_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/roblox-how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/instantrobux_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.rajmahalproductions.com/uploaded_files/userfiles/files/how-to-hack-roblox-games-on-pc_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_off000030bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BC 21556 bytes
SHA-256: 4f70af78151048bb8c57a0f326f4d308d4c67e5c0245151307423279f47c48d1
font_01_sfnt_off00006002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 19056 bytes
SHA-256: 5fd868e4ea22638534696fb0cd66a74addf388445670d9d0517416fd5b37f315

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