Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1e9a83e7e9ea38…

MALICIOUS

PDF

40.7 KB Created: 2021-05-10 22:07:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3a76f86e0543a2896e9f288e80d0a41c SHA-1: e95cb5553a8604a9d6db3dbda095d378994d2474 SHA-256: 3e1e9a83e7e9ea385fef3f806cb5c80de12c42376eb490a8b7b150379b07a130
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains heuristics indicating it links to malicious redirector infrastructure, specifically promoting a "free generator / game hack" for Roblox. The embedded URL leads to a known malicious domain, and the document body contains a call-to-action to "CLICK HERE TO ACCESS ROBLOX GENERATOR". This suggests a phishing or scam attempt designed to trick users into visiting a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/roblox-promo-codes-free-robux-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003211.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3211 25672 bytes
SHA-256: a70d9af5d866450258565726c35eac44532813e2d6a11eb0832985aca37a4723
font_01_sfnt_off00006c74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C74 4660 bytes
SHA-256: b8980cdac4d025496d9fe039d8c05bb5b9bae1b804244a1f9c05e9663db72816
font_02_sfnt_off00007c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C84 18676 bytes
SHA-256: 3ed324e585500d41944ebd93500991c566830021fec9c5a8323b790459c3443f

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