Malicious PDF — malware analysis report

Static analysis result for SHA-256 be74b73c2fb70918…

MALICIOUS

PDF

39.6 KB Created: 2021-05-13 16:04:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5adadd7fd561b6a7aaab384b94489b4e SHA-1: a9a3a1aaee9175d90ab5121cdd9e53b362226ae7 SHA-256: be74b73c2fb709181248e7b66b74ab7bec61e59f63da5e8572a8685c26b93293
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple critical heuristic firings indicating it links to malicious redirector infrastructure, specifically for a "free generator / game hack" lure. The embedded URL `https://netcdn.xyz/app/431946152/boku-no-roblox-hack-game-hack` is identified as malicious. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest it's designed to exploit user interest in game hacks to deliver a payload or phish for information.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/boku-no-roblox-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_off00003647.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3647 29936 bytes
SHA-256: b78dd42f452de521fb6494fb333bd0ac3b8ede7d60e43252f10ba5e88e917348
font_01_sfnt_off0000799d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799D 18320 bytes
SHA-256: cd83af5ba5492d0d90d9a213d6c06333e9cd9f39d2b07ffbf91c7f3a8ed3d34e

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