Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e3eff14778b08f…

MALICIOUS

PDF

33.0 KB Created: 2021-07-20 16:42:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5886e30b0c070a93e90ff9fb19708170 SHA-1: 8165c1b48c705d59e7ddda9bf590baa763c44972 SHA-256: 89e3eff14778b08f5201b377ae4ae4630c8f14d73eeb48413c84ad44e05e6b89
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirectors and known malicious infrastructure, specifically advertising 'free Robux' and 'game hacks' to entice users. The document body explicitly contains a call to action 'CLICK HERE TO ACCESS ROBUX GENERATOR' and a primary URL that is flagged as a malicious redirector. This suggests the document's primary purpose is to trick users into visiting malicious sites that likely host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/games-that-give-you-free-robux-game-hack In PDF document text
    • http://depelem.fr/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://depelem.fr/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/free-robux-no-password_GM431946152.pdfIn PDF document text
    • http://depelem.fr/images/minecraft-free-download-ios_GM479516143.pdfIn PDF document text
    • http://depelem.fr/images/is-minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://depelem.fr/images/minecraft-name-tag-hacks_GM479516143.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_off00002a09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A09 22256 bytes
SHA-256: c454df237c7d6b7ea9f638aa1fbc974ded48083d67d13ae1f6981353ed2c2b26
font_01_sfnt_off00005ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA4 19352 bytes
SHA-256: 28ad90d7edcf929d37a814a21d27f083841fc3a35400a1a93d6e572bead5d0d1

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