Malicious PDF — malware analysis report

Static analysis result for SHA-256 4706697ea5c4e00e…

MALICIOUS

PDF

38.4 KB Created: 2021-05-07 12:42:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: baa4116105c642626e41333e486c071f SHA-1: eec21a1b2131baaba159a936001b96be6ba0c2a2 SHA-256: 4706697ea5c4e00ed0883532eaaea5d59d20c597edbc4cb40d116ccba4e5461f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and text that explicitly advertise a "Free Robux Hack" and a "CLICK HERE TO ACCESS ROBLOX GENERATOR" button. Heuristics indicate these links point to known malicious redirector infrastructure. The document's content and structure strongly suggest a social engineering lure to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

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-hack-no-verification-no-verification-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_off000039b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x39B8 25600 bytes
SHA-256: 0ca48c2ccc620a739ca97c618b37d9ae772fbaf574b8c67ab99952a8ec3ef6f0
font_01_sfnt_off00007469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7469 18464 bytes
SHA-256: 581bc0523f6378a4e4ee214e2d03841239fd87888d165e723902aebd14b26c19

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