Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b2f0e2b7871376…

MALICIOUS

PDF

34.9 KB Created: 2021-05-21 05:48:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: fffdcaf48d3caa197b2a251bd713b0a1 SHA-1: c4ba87c6b78ef1e944b4b5612b5113f1a9942b92 SHA-256: 48b2f0e2b7871376ccf1a370ee6e0d8463083bbf32e2b2375cabc95e955802f1
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-app-game-hack' is identified as malicious. The document body also contains explicit calls to action like 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-app-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_002_off00002f34.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F34 24696 bytes
SHA-256: 58b57a09c4c04b55d2d89c749e93137bc595c19ef74eee542e99b0b6b90abb94
font_01_sfnt_off000067b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67B6 18124 bytes
SHA-256: b55918b8480f66a9a053d61f951430dbcd2a64ad9c4d9286342bad064f4e5d72