Malicious PDF — malware analysis report

Static analysis result for SHA-256 652c9703ba675953…

MALICIOUS

PDF

34.7 KB Created: 2021-07-08 05:38:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7d21e3b16516a88ab405967bc2f4e900 SHA-1: efc0f0f7b29d366f0722677b326d9df9838f4c47 SHA-256: 652c9703ba675953bb2b6d3cb005810a7bebef6e19c13c4b4fc0c1ff5046bd8a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirectors and other malicious PDFs, masquerading as 'free generators' or 'game hacks' for popular games like Roblox. The primary lure is to trick users into clicking these links, which likely leads to further malware downloads or phishing attempts. No scripts were extracted, but the document's structure and embedded URLs strongly indicate a malicious redirection workflow.

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/how-to-get-free-robux-on-roblox-2021-game-hack In PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/external-roblox-jailbreak-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/koszulki-roblox-free_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/cheats-coin-master-free_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/nopde-engine-roblox-hackes-prison-life_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-roblox-gift-card-online_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-college-textbooks-tiktok_GM835599320.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-roblox-commands_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-4-mobile-24-robux_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/cheat-engine-roblox-trainer_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/mcpe-com_GM479516143.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-free-tiktok-coins_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_off00003098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3098 21956 bytes
SHA-256: b6b8f54315c7babb7f2ab6d457e59e078752110f8e99a619936cff269920ca71
font_01_sfnt_off0000611f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611F 19460 bytes
SHA-256: a88a3b37d26ae7f28ec6954540056097f0f8d6b678a801dc09bd2df82b34d325

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