Malicious PDF — malware analysis report

Static analysis result for SHA-256 630f1f55ebe841d6…

MALICIOUS

PDF

39.8 KB Created: 2021-05-16 11:31:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b120122759e514043905d2ccb68de517 SHA-1: cfc083842da95b5393a6f6afb08f16f95c4f3f3d SHA-256: 630f1f55ebe841d6e3f860d79114d38f3fdff3c51280d158f460477fa33f41ad
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a lure for 'Roblox Com Free Robux' and a prominent call to action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR'. This lure directs users to a malicious redirector URL, indicating a phishing or scam attempt. The PDF structure and embedded content suggest it's designed to trick users into clicking the link, which is a common tactic for delivering malware or leading to fraudulent websites.

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-com-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_off0000308a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x308A 26204 bytes
SHA-256: b5ab1e34a044b7113ac4411aa8469fa9248b049382a6c770248d65adca3821c7
font_01_sfnt_off00006d66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D66 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00007a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0D 18348 bytes
SHA-256: c296ce3e2e2a101d3e2a91d968c24b195b6c9a3a72cf9c6f74fe8dc429b2d5e3

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