Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb64bb80707aa44…

MALICIOUS

PDF

37.3 KB Created: 2021-05-10 11:16:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 3a34dbf273f5f2cfb52ad74d1c465548 SHA-1: 0e9a95187b50d304311840da16e9c9daa2bed0c0 SHA-256: dcb64bb80707aa443e9b7cae711f0034071a0dd6986187b9c558b0d634ddb3fd
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a 'game hack generator' lure. The embedded URL, https://netcdn.xyz/app/406889139/moonactive-coin-master-game-hack, is identified as malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to redirect the user to a potentially harmful site, likely for further exploitation or credential harvesting.

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/406889139/moonactive-coin-master-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_off00003857.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3857 25428 bytes
SHA-256: 30a666b752c318c0e2ca7288663447827bba97efa4e4f85a112b9895c91c1d6b
font_01_sfnt_off0000727a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x727A 17660 bytes
SHA-256: 54ebc39010e93fb8f764eb9b1a3ef964e9d80d147d904f4e34bed2a832e067e1

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