Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df7ff4988a3124e…

MALICIOUS

PDF

40.0 KB Created: 2021-05-16 19:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: be9a4204ee2ee1ebc1d3bf7284bf71ed SHA-1: ad6a9d14eae333a9af415f861107e3c9e868c4d9 SHA-256: 0df7ff4988a3124e8a07b67f882284419c785d8b8e42ad83fc5bcc7ec8dea911
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it links to a malicious redirector disguised as a 'free generator / game hack'. The document body reinforces this by displaying similar text and a call-to-action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', directly linking to the malicious URL. This suggests a social engineering attack aimed at tricking users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/free-robux-without-human-verification-2021-game-hack In 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
stream_003_off000035ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35FF 28204 bytes
SHA-256: 445eba6f8040813334bd95f38124b12824a89cd0e7e44f9d7627d5c7a9fb09c8
font_01_sfnt_off0000773c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x773C 19624 bytes
SHA-256: 5c907f8fc0171ac382cbe47737dfe307495a07ea2f2097b2a41ed37680731fb3

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