Malicious PDF — malware analysis report

Static analysis result for SHA-256 e072d9acecef9f44…

MALICIOUS

PDF

36.2 KB Created: 2021-05-10 10:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: a371498577202454332905bf177b8a38 SHA-1: f914842064af7dd917c0730bda1a2625b7e48b8b SHA-256: e072d9acecef9f4479c7c4f51a8e543ef57ed2dbdcd70e9a41c1323810227eb6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free Robux generator' and includes a prominent call to action to download. It embeds a URL that is flagged as a malicious redirector, indicating a phishing or scam attempt. The document body text and heuristics confirm the intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0302

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-to-get-1-million-robux-for-free-2021-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_off000031de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DE 24480 bytes
SHA-256: d387beb286090e7ab96455f4e3630e94344ee1854e8e4b906861604b748b0208
font_01_sfnt_off000069b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B1 19072 bytes
SHA-256: 6899649986c08cd88da4e8ab8a55ee52e34bf21c69bba097983649bb28a6798f