Malicious PDF — malware analysis report

Static analysis result for SHA-256 abdb78a2f94f10b3…

MALICIOUS

PDF

37.8 KB Created: 2021-05-12 12:10:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2cda591f6248790b7e5f1cfef963951d SHA-1: 0bde6a4801ab0e792cecc4017e3b457afc541492 SHA-256: abdb78a2f94f10b3c093be493f00e997073af6cfdc0ff398dce5645075677a69
130 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. The document body also contains a prominent call-to-action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the lure. This pattern suggests an attempt to redirect users to a potentially malicious site, likely for credential harvesting or further malware delivery.

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-do-you-get-free-robux-without-paying-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_off00003278.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3278 25516 bytes
SHA-256: 50c5ed3baee0ecdefdbe8bf554a26a66e89c2e7896866441632d892a508534fe
font_01_sfnt_off00006d96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D96 19948 bytes
SHA-256: 5d1001e3ac77277796354ae1628373f4f4a3ba3fa344903a86c4555bafe1b783

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