Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f329bf57e8270c1…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 01:18:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 750f5f293f37ffabc075f555d48955e1 SHA-1: ca11d3897331c5c3c14ba6cbeb59b9d6b8bcc494 SHA-256: 5f329bf57e8270c15c07b17cd8a5fb4e54270556ebbdbc37db9bd1d10d62dd95
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.tw/app/406889139/coin-master-real-hack-game-hack. The document body and embedded links suggest a lure for game hacks, likely intended to lead users to phishing or malware download sites. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack.

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/406889139/coin-master-real-hack-game-hack In PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-only-username_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/https-pastebin-roblox-hack_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-infinite-jump-hack-download_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/cheat-course-dobstacles-dlirante-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-hack-wins-on-anarchy-roblox_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/shotgun-willy-cheat-codes-roblox-id_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-the-lords-of-nomrial-hack_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-key-in-new-hack-roblox-sh-team_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/roblox-hack-for-all-games_GM431946152.pdfIn PDF document text
    • https://aits.co.id/ckfinder/userfiles/files/good-roblox-hacker-names_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_off0000374b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x374B 23144 bytes
SHA-256: ea77004189da8725a1d2ded0c09eb07296ede715ba114ddb49c85402cb427836
font_01_sfnt_off00006b60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B60 18080 bytes
SHA-256: ecaa553bbc3bb0be3309ebcef64813697d93a2640435283d6d3ff843f546506a

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