Malicious PDF — malware analysis report

Static analysis result for SHA-256 849316f1d15709f0…

MALICIOUS

PDF

35.7 KB Created: 2021-06-25 18:25:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cf3c4ef434c124c1c2dd9f6939da9ca1 SHA-1: 4e87607b8b58fb12c0bfb1468be5b8845977a8f6 SHA-256: 849316f1d15709f06c9c835e6973241df06d1d275dcf4c801a05284dbae2d544
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks, specifically for Roblox, to trick users into clicking a link. The embedded link redirects to malicious infrastructure, as indicated by multiple heuristic firings and the ML classifier. The document body contains numerous related URLs, suggesting a campaign distributing such lures. No scripts were extracted, but the primary attack vector is the malicious 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.co/app/431946152/roblox-strucid-hack-download-game-hack In PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/hacks-roblox-yt_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/robux-only_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/wwwroblox-cheatgdn_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/app-master_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/roblox-colouring-in-free-download_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/pokemon-go-free-account-2021_GM1094591345.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-minecraft-skins-java_GM479516143.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-robux-hack-no-download-no-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.tradenextindia.com/uploaded_files/userfiles/files/free-followers-on-tiktok-no-human-verification_GM835599320.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_off000031f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F5 22724 bytes
SHA-256: f046afc2477fffd9159cfe85096d496534def68eb53f181a0f8fcb9ea24b67e7
font_01_sfnt_off000064f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F2 19528 bytes
SHA-256: 267a0549008f8edc6c7d0240fa94acd6ea655580d5d2cae4de1f9dc55ad44c4e

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