Malicious PDF — malware analysis report

Static analysis result for SHA-256 0085dbd2c8f35652…

MALICIOUS

PDF

34.8 KB Created: 2021-05-20 18:45:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3d467da469a28d500bb96488e503bb9e SHA-1: d879401f4cdb9dac48663c970d99cabc96a0e171 SHA-256: 0085dbd2c8f356525efabd6e7c6f1690e60e1d01b8fcbb4ca58be4a686ab24d8
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a "Robux Hack Generator". The presence of a call-to-action button further supports the lure. While no scripts were directly extracted, the PDF structure and embedded URLs indicate a phishing attempt designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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/robux-hack-generator-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_002_off00002d41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2D41 24896 bytes
SHA-256: 89a9c1e8e1690563b2619f2fd8f3c2b62fe70df8cab5b01d3ae1409558396a8e
font_01_sfnt_off0000669a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669A 18352 bytes
SHA-256: f5433ce3dc9930d213a8e7315569ee207b9df6dd56817c97a1fb358bc14a6a3b

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