Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bdcaf872ad7d2c8…

MALICIOUS

PDF

36.3 KB Created: 2021-05-24 03:32:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b6e3571fdcda0a06ffad313b616ccfff SHA-1: 6a98b4e7a51188c0d042a53cfe73a8bbbb7cca4d SHA-256: 0bdcaf872ad7d2c8948f8791f233145e7aa6951ac996481e830e5eef82279676
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to what appears to be a game hack generator, specifically targeting 'Robux' for Roblox. The primary link, https://netcdn.xyz/app/431946152/blox-fish-free-robux-game-hack, is flagged as a malicious redirector. The document body and embedded links suggest a phishing lure designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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 https://netcdn.xyz/app/431946152/blox-fish-free-robux-game-hack In PDF document text
    • http://www.maisonvallomy.com/images/coin-master-hack-spins-game-download_GM406889139.pdfIn PDF document text
    • http://www.maisonvallomy.com/images/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://www.maisonvallomy.com/images/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.maisonvallomy.com/images/minecraft-bedrock-free_GM479516143.pdfIn PDF document text
    • http://www.maisonvallomy.com/images/free-followers-for-tiktok_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_off0000316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x316A 25272 bytes
SHA-256: 537a69ea69df966999e373354585446112e4b34a362b4248e4a01964b5983c0f
font_01_sfnt_off00006c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C51 18376 bytes
SHA-256: 833bfe47d36e77ffff594e1188eeee77c72f4d78f65cd820fb361f10e8c51563

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