Malicious PDF — malware analysis report

Static analysis result for SHA-256 724d205e4cf690c8…

MALICIOUS

PDF

38.0 KB Created: 2021-05-13 18:32:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8f6ac70eeea11f32b5ef79be27398a84 SHA-1: e5c3a4e04a0037e4739a66c6f6ecffa7e708c077 SHA-256: 724d205e4cf690c84d7aab2402fb0f1e64885ab98e16df8b2b5cfeba486e6a7a
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a lure for 'Free Robux Without Human Verification 2021' and embeds a link to a known malicious redirector. This suggests a phishing or scam attempt designed to trick users into visiting a potentially harmful website. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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-without-human-verification-2021-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_off000035f7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35F7 24892 bytes
SHA-256: f07ab6e3a2d7103d37a62e59bc56fd823bd730acad7ad91b1b8b441e0932dd8f
font_01_sfnt_off00006f7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7D 19624 bytes
SHA-256: 5c907f8fc0171ac382cbe47737dfe307495a07ea2f2097b2a41ed37680731fb3

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