Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed724589369ba7e…

MALICIOUS

PDF

25.9 KB Created: 2021-07-04 09:51:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: de8006fc12e4aa1dba1aea2543832499 SHA-1: 28350e576d060bb3a8d358df2b5409012350519b SHA-256: 7ed724589369ba7e929b91dfc9c61ada9155c007f60bca2031723d3fba1e14c7
130 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' that links to known malicious redirector infrastructure. The embedded URL, http://netcdn.tw/app/431946152/adopt-me-roblox-hacks-game-hack, is identified as malicious. The document also contains a visual call-to-action button, further encouraging user interaction with the malicious link. The use of a PDF document with a lure suggests it was likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.0506

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 http://netcdn.tw/app/431946152/adopt-me-roblox-hacks-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
font_00_sfnt_off000015e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E4 20008 bytes
SHA-256: 761145df49c4642d9d2c24aa5e10d873e089e47f9406b6fcf032455b34d47714
font_01_sfnt_off00004078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4078 19308 bytes
SHA-256: 22934774863ac3be514f624650c183b4034f40a3033292b7237229c7ea0ab873

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