Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d55debb8989c8ed…

MALICIOUS

PDF

36.6 KB Created: 2021-05-10 15:02:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7a6d231d8e4a42f3dbf01a29c347882c SHA-1: 4825e272d0d64dd8c52857e96f5a072f71a6501e SHA-256: 4d55debb8989c8ed276bd72a71b5e20e1da696327aaa550ef114d4e54e38a166
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically for a "free generator / game hack" lure. The embedded URL, https://netcdn.xyz/app/431946152/free-roblox-wings-game-hack, is flagged as malicious. The document body also contains this URL and a call to action, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and malicious links suggest an attempt to redirect the user to a site that likely hosts further malicious content or phishing forms.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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/free-roblox-wings-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_off0000323b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323B 25352 bytes
SHA-256: b36ee23e49afdb0c0a58a3714b921e5d71ec5819703853dbc8342e35c4d71145
font_01_sfnt_off00006cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CAC 18556 bytes
SHA-256: be4a7fa60d0342eba16b97979fd8cdd281d22ca1626ad71a9b2f053d4e6b2b75

Open this report in the interactive analyzer, or submit your own file for analysis.