Malicious PDF — malware analysis report

Static analysis result for SHA-256 272d9ab1a390605d…

MALICIOUS

PDF

36.0 KB Created: 2021-05-22 03:05:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 21629ef47ffc2994e8562bc75c24da00 SHA-1: 0829cfdde872b3fdfcfbfe33101677fa10a6ed27 SHA-256: 272d9ab1a390605deb1b9dc26f9083d69e8a6c80d3a501836f16c5bd51469ab6
130 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links, specifically targeting users with lures for game hacks and generators. The embedded URL 'https://netcdn.xyz/app/431946152/www-free-robux-game-hack' is identified as malicious infrastructure. The document body also contains text related to 'Www Free Robux' and a 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/www-free-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_002_off00002d2b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D2B 27140 bytes
SHA-256: a616d74f89f761f705cba3b628f2fbf871ca5eff5659dc3e949a9157f097df8c
font_01_sfnt_off00006b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B67 18376 bytes
SHA-256: 3afa3067d1f3c9d8d4e5028784d7d2a7352a3b977a914758f486701e4d265e0a

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