Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd60d913a84b0f17…

MALICIOUS

PDF

34.7 KB Created: 2021-06-27 21:44:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 887a36c74c38e886f4f3a1ab0fb18ae0 SHA-1: 1ccccb86b8c166f1b20182f4ee336351e6941051 SHA-256: dd60d913a84b0f172034518e5e14aa26eb3b46d46fc97474b02a7b66a591ed15
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users with promises of free in-game items and hacks, specifically targeting games like Roblox and Minecraft. One critical heuristic identified a link to known malicious redirector infrastructure, which is likely used to serve further malicious content or phishing pages. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting malicious sites.

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/is-there-a-free-way-to-get-robux-game-hack In PDF document text
    • http://mbbs.hr/files/free-roblox-clothes-boy_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-roblox-svg_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-free-ios_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/free-robux-finish-obby-no-password_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/esp-hack-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-wurst-client_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/hack-my-roblox-account_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/roblox-cheat-engine-youtube_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-earn_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/hack-initiate-unlimited-free-robux-40m_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/robux-hack-no-download_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/impact-hacks-roblox_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_002_off00002e20.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E20 22792 bytes
SHA-256: 3b6354e6edc3bbf3750f99b12a010646017812b64171502bdf50ad99135e0163
font_01_sfnt_off00006171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6171 19364 bytes
SHA-256: e918f60ce7c7850b03c14a1819e51c87dfc0bc6c6a5cc96dc4a70376a75ad2e9

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