Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9e6e5e437318e1a…

MALICIOUS

PDF

37.6 KB Created: 2021-05-15 06:02:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e55bc77fcdb2bb64e572776b79c59009 SHA-1: b0a2341740d096b078944bc70b4eaa88ada2b223 SHA-256: c9e6e5e437318e1a0291a101e8ff8b6dbc8dbcbe13ce35bab56c9989f082e809
130 Risk Score

Malware Insights

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

The PDF document contains a lure for 'Free Robux Cards' and a prominent 'CLICK HERE TO ACCESS ROBLOX GENERATOR' call to action. This link redirects to a known malicious URL, indicating a phishing or scam attempt. The document's structure and embedded content suggest it's designed to trick users into visiting malicious sites, likely to download further malware or compromise their accounts.

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/free-robux-cards-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_off000034eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34EB 25740 bytes
SHA-256: 93bd5f3b092532f83d12476e3b9c66fae9d7e6187a1c66ffe802b2935f8a7e18
font_01_sfnt_off0000711c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711C 18416 bytes
SHA-256: 79c56a0f23d4fc34690a575a065be14b64911c3c5a3331038291264b4b7107af

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