Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e1c4f627817748…

MALICIOUS

PDF

36.8 KB Created: 2021-05-11 22:02:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d3ed4feeb842ae2797a30edf4f1aa997 SHA-1: 517465663d37c2f3da9f6f479d05edbc9cd94c93 SHA-256: 37e1c4f62781774855d817a47a2d3ff2244731c1484ccbd68760210e17c6da76
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to malicious redirector infrastructure, specifically advertising a 'free generator / game hack'. The embedded URL 'https://netcdn.xyz/app/431946152/how-to-buy-robux-for-free-game-hack' is identified as a known malicious redirector. The document body and metadata suggest a lure for obtaining in-game currency, likely a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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-buy-robux-for-free-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_off000033cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33CF 25896 bytes
SHA-256: e14e4a8d528d5b51416e6b422dff6a39332c4d1cb555398f219d622611928665
font_01_sfnt_off00006e2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E2A 18356 bytes
SHA-256: 42cf6025b0828d48dcef6abba26d08473f6f67d2383591dd07323470bab2f866