Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bb7c9eb608c992…

MALICIOUS

PDF

35.4 KB Created: 2021-05-12 04:08:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 34f0eaf6acca26dad174c0ae4605ca10 SHA-1: c90a35811ac7c40cbcd001ea897b3b16d00004be SHA-256: f6bb7c9eb608c99243fb0e0bd88dfd12491b8db5ccd107f336e4e3e5a8956da0
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically advertising a "free generator / game hack". The embedded URL, https://netcdn.xyz/app/431946152/easy-robux-hack-game-hack, is confirmed to lead to malicious infrastructure. The document body and other facts reinforce the lure of a game hack, suggesting a phishing or scam attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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/easy-robux-hack-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_off0000303d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303D 26144 bytes
SHA-256: cbf9045a55545ae4f970ac5df8d18346db56bb661f4125a5268bfe9fdc8f64d0
font_01_sfnt_off00006ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB1 17708 bytes
SHA-256: 2a6538a9de69aebd972341607da490b174211c1198bbf49cec5cdf65f0169068

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