Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca2cef8fec44040…

MALICIOUS

PDF

37.3 KB Created: 2021-05-18 00:03:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 6770b311be5c81045bf96bb057d9bea5 SHA-1: dfbba5ea0328d78df37adccb6cf57fa977f61a75 SHA-256: 5ca2cef8fec44040e51f24b1f5373100d4b7baad57bac3b1357dfe6452b6badf
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a 'free generator' or 'game hack' lure, indicating a social engineering attempt to trick users into downloading further malware. The document body explicitly mentions 'How To Get Free Robux On Pc' and includes a call to action to 'CLICK HERE TO ACCESS ROBLOX GENERATOR', reinforcing the phishing pretext. The presence of these links and lures strongly suggests a malicious intent, likely to deliver a second-stage payload.

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/how-to-get-free-robux-on-pc-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_off0000358d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x358D 25364 bytes
SHA-256: f3ae2214b2603ea06547968189943d423844c614958bd06d7ab509d614575046
font_01_sfnt_off00006fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE9 18436 bytes
SHA-256: 3da4067756d8a9659bbf1d91e8f5987ff560a340f178cc4f41ff3c3676747205

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