Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cf8ad2d4717905…

MALICIOUS

PDF

38.2 KB Created: 2021-05-15 10:30:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b5917262dc7a65037e6eddf63e9f3f97 SHA-1: 48e949b62533945abef6d482500ee7aad99dba68 SHA-256: a9cf8ad2d4717905828c250c4ec0fce9c9038a9f5ff23b43b72d9e390b2689b0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'Roblox Robux Hack Generator'. The document body and metadata confirm the lure is related to game hacks and generators. While no scripts were explicitly extracted, the nature of the embedded links and the heuristic firings strongly suggest a social engineering attack aimed at redirecting users to potentially harmful sites.

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/roblox-robux-hack-generator-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_off000033bb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33BB 28272 bytes
SHA-256: bfe7688c80f1fd3b3525c8b2cfabb27972bc23a63e806e858e66ee38f1a5ffcf
font_01_sfnt_off00007360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 18428 bytes
SHA-256: bdac85b283ea9edec09d9f64e9cfc1f18bf7d6a92d05f58e23f3db2f02fbf028

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