Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ea9323f4d261d47…

MALICIOUS

PDF

34.5 KB Created: 2021-05-21 11:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6992274552ca1b1ee2db4c0737962cb8 SHA-1: 094659f4db9a1b5566fe1d5a6862ab629a4e88ce SHA-256: 6ea9323f4d261d47339dbb7bb9755728e044a1dc8e3d4a922889239eb680bd8f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a 'free generator' or 'game hack' to obtain Robux, directing users to a known malicious redirector URL. The document body and heuristics indicate a social engineering tactic to trick users into visiting malicious websites. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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/how-to-get-free-robux-on-android-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_off00002af7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AF7 25112 bytes
SHA-256: 7e0e8c2258ecace8dc8851ac08a5c45be70bb10ed8ebc5741c558c785c91fe7a
font_01_sfnt_off000064a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A3 18576 bytes
SHA-256: be12fe34256d848f1a7db569f7882c3333b0548de7731ecd127307da0fa566a6

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