Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cb55d4da417e65f…

MALICIOUS

PDF

39.4 KB Created: 2021-05-10 21:25:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8787a66bc7e1088b3a5a9ccc71874aba SHA-1: 56a86061f904e231b171156a0a2f7c0edf2844a2 SHA-256: 5cb55d4da417e65f475eb53f520e6d647295a0fa0c6052ab41b07ca6216819c8
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically advertising a "game hack" to lure users. The embedded URL, https://netcdn.xyz/app/406889139/mcpe-master-hack-unlimited-coins-latest-version-game-hack, is associated with malicious redirector infrastructure. The document body also contains similar text and the malicious URL, reinforcing the lure. Although no scripts were explicitly extracted, the PDF structure and heuristics strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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/406889139/mcpe-master-hack-unlimited-coins-latest-version-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003441.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3441 25272 bytes
SHA-256: 13e032774987240845aecaa7b809396da04319d54565c77c1a7a95fbb9cdefc0
font_01_sfnt_off00006c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C86 18720 bytes
SHA-256: 9a564b0c0a644540a66c1b1ff06b652386e2dfb1d0e582b0e17ab2c442631031
font_02_sfnt_off00008fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FD9 3264 bytes
SHA-256: e32c06502c11b52acb5e814091c5fdbffd1e2a904ac7a9cfb8b5b180bd139088

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