Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd678222e2312564…

MALICIOUS

PDF

35.6 KB Created: 2021-05-21 11:02:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 57c96507ec5072e7a6d4565f76680731 SHA-1: 5347db943edd7d6832f7c286a055d9202f69c155 SHA-256: cd678222e2312564e33b4e8feb4c6f48c732be8781040d5c40490962fea8a9aa
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'game hacks' and embeds a URL that is flagged as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'How To Hack Roblox Jailbreak' and a call to action. The embedded URL likely leads to a phishing page or a malware download site.

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/how-to-hack-roblox-jailbreak-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_off00002e45.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E45 25324 bytes
SHA-256: 32392a09aa03a93de2595f330a62780d26a37b330b81075af119d502e10d11e3
font_01_sfnt_off00006924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 18632 bytes
SHA-256: f85879c678901057cc908d94130b71f9fb6e8ee5be1c9db29d303049c5d159a2

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