Malicious PDF — malware analysis report

Static analysis result for SHA-256 dafba0739491791d…

MALICIOUS

PDF

36.4 KB Created: 2021-05-20 22:55:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ddfd7870e58435fb676a3a9de78049fa SHA-1: 79a582ac2e0971d9fe7d38246a5079389bb1db9d SHA-256: dafba0739491791d8e9c3983843fd0b64e4e97a537b6f4a8fcb3a7aa8f91ec55
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is designed to redirect users to malicious websites, specifically advertising a 'free generator / game hack' for Roblox. The embedded URL, https://netcdn.xyz/app/431946152/free-gfx-roblox-game-hack, is flagged as a known malicious redirector. The document body also contains text and links related to this lure, suggesting a phishing or scam 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-gfx-roblox-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_off00002c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3B 29584 bytes
SHA-256: 831dec8954d0e9cc46b7d92e79450037c5625a61b923abf5a10590193c1629b0
font_01_sfnt_off00006e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E85 17948 bytes
SHA-256: 93c837e91696f9c750ee981a8553ec938bcc839a54d12736034a756f397dcd55