Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb1f1109404cdcd…

MALICIOUS

PDF

31.7 KB Created: 2021-07-19 09:44:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e648db3d51a2be7bba47866d284aa690 SHA-1: bc70cf562b6f6691478662d798f97eb25d642dc5 SHA-256: 8bb1f1109404cdcd1a1a374520dab9ea8d86e60fce92ef5cfdc68f684f3f57f5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple lures related to 'free Robux' and 'game hacks', directing users to suspicious URLs. The presence of a 'CLICK HERE TO ACCESS ROBUX GENERATOR' call-to-action strongly suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content or exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-no-verify-game-hack PDF link annotation
    • http://unifieo.br/images/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://unifieo.br/images/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • http://unifieo.br/images/how-do-you-hack-roblox_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/robux-hack_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://unifieo.br/images/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://unifieo.br/images/minecraft-skins-download-free_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_off00002801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2801 21976 bytes
SHA-256: 4b9e78c7edb1bb020ca93c46c7029ed7d81f454ce2c410003abaa0de21ffd043
font_01_sfnt_off000058ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58AB 18632 bytes
SHA-256: ab568fed1de22e4f9e44d61f81238b6869891b9e72775c0eef2883527e5d17e8

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