Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b458d9dfdc96027…

MALICIOUS

PDF

35.6 KB Created: 2021-05-17 06:30:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4af8a7c0d88028e48da6efd0cd18efd2 SHA-1: 94b57bcb5a9e4012d513b6c555be16082bc7298a SHA-256: 9b458d9dfdc96027360c7ae980a0b295a5a5ab25f54e476c1625fec294eefe95
130 Risk Score

Malware Insights

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

The PDF file contains a lure for 'Roblox game hacks' and embeds a link to a known malicious redirector. This suggests the document is designed to trick users into visiting a site that likely hosts scams or facilitates malware downloads. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier clean score 0.0282

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/woman-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
stream_003_off00003103.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3103 24448 bytes
SHA-256: 1b45b17eb7715bd1e4297c703defb4a3d3484ed917696744b3a662d023c3cd8f
font_01_sfnt_off0000691b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691B 18468 bytes
SHA-256: 92a7e3fdf75e6a3eed9122ed44239e161dce5939606c0e86a8fd8d519394caff

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