Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf00059a0e9df234…

MALICIOUS

PDF

34.8 KB Created: 2021-07-06 22:11:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 93ef6d669d44926d67749812447c6423 SHA-1: b199ffa095bf40baa87a95c248a64bebb2cc10bd SHA-256: bf00059a0e9df234e28e45832d51934e896c1d0431529588f5d17418303f6a44
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting 'free generator / game hack' lures for popular games. The primary link, http://netcdn.tw/app/431946152/dominus-roblox-free-game-hack, is identified as a malicious redirector. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting potentially harmful sites. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a phishing or malware distribution attempt.

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/dominus-roblox-free-game-hack In PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/roblox-com-www_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/coin-master-32-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-clothes-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/hack-codes-for-roblox-rb-wolrd-2_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/legitimate-coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/how-to-hack-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/hack-de-roblox-para-todos-los-juegos_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/hack-someones-account-roblox_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/how-to-make-a-free-admin-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/how-to-get-robux-free-roblox-glitch-2021-savagery_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/speed-hack-roblox-ccv3-2021_GM431946152.pdfIn PDF document text
    • http://vavafashions.com/uploaded_files/userfiles/files/free-robux-gen_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_off0000328c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328C 21816 bytes
SHA-256: f6a3cf215fa8c462a718a88900dea5faba63468a628ddbe0a43b463c056a5c01
font_01_sfnt_off00006287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6287 19340 bytes
SHA-256: 2baa4a424f72436de07ce77037064002e5e6fbd5f5b1d91ab01ade787eb1f944

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