Malicious PDF — malware analysis report

Static analysis result for SHA-256 be1d47e7a7fa9388…

MALICIOUS

PDF

38.0 KB Created: 2021-05-17 04:33:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d1fc57c2df7f2cb0a2b629dbb270251f SHA-1: 5882982f4ba07cab74eced0a32070412b2a5f434 SHA-256: be1d47e7a7fa93887ab65b793d2fbaa673854d721dd571c4b3d9ab3df77d9241
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it links to malicious redirector infrastructure, specifically a lure for 'free generators' or 'game hacks'. The embedded URL 'https://netcdn.xyz/app/431946152/how-to-hack-robux-game-hack' is associated with this malicious activity. While no scripts were explicitly extracted, the PDF structure and content suggest an attempt to trick the user into visiting a malicious site, likely as part of a phishing or malware delivery chain.

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/how-to-hack-robux-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_off00003412.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3412 27328 bytes
SHA-256: f6602d1a54a3d254a1571bf0da8c37e292a171be883bd0e0a422f335702547d8
font_01_sfnt_off000072ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AB 18412 bytes
SHA-256: 799ae8847f356c5b4d712fc876b96dd84d848442331064266ecb6e470ae97e62

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