Malicious PDF — malware analysis report

Static analysis result for SHA-256 075dd7955e1c54cf…

MALICIOUS

PDF

32.5 KB Created: 2021-06-11 00:13:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2aa21fa8efdc96b34c7378ab9854c6ec SHA-1: e8280d54d1c86a03b876d05c9e2510fc50771407 SHA-256: 075dd7955e1c54cf31c7b1d28136a3954e06e077cbcddba2a6ece169e7353472
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a malicious redirector link disguised as a game hack generator. The link, 'https://netcdn.tw/app/431946152/royal-high-school-roblox-hacks-game-hack', is designed to lead users to a malicious site, likely for downloading further malware. The presence of a 'download button' heuristic further supports the malicious intent of tricking the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0078

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.tw/app/431946152/royal-high-school-roblox-hacks-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00001cbd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1CBD 23044 bytes
SHA-256: 15643534a790e262822be19ffa36ce0eb9d7034323ff7a697b3baffc4e7ad6ac
font_01_sfnt_off000050b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50B0 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00005d57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D57 18216 bytes
SHA-256: b4b27e25d243b82b39207866e1147738140a26429159ad128768688fe3fcdcd2

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