Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ac1b12bc72f2eef…

MALICIOUS

PDF

40.4 KB Created: 2021-05-15 00:33:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: defe15d49938ac3ca479067991feb030 SHA-1: 6aaea7509f425a1ee1e750b2871fba4adf437fe5 SHA-256: 7ac1b12bc72f2eef62be36fb78bf572984dab108d96d7a9bffa2772997e004fc
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'Coin Master Hack App' and includes a critical heuristic firing for a malicious redirector link. This link, 'https://netcdn.xyz/app/406889139/coin-master-hack-app-for-iphone-game-hack', is designed to lead users to potentially harmful content. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into visiting a malicious site, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/coin-master-hack-app-for-iphone-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_off000031d3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31D3 24476 bytes
SHA-256: a8a7182d6cf7f12427054f93819940f875f8e2b4e0d28dc5ea934475e876aba6
font_01_sfnt_off0000688a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x688A 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00007d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D15 18220 bytes
SHA-256: 839fd5949bb49b5044eb4b433cc9049edf304667089f82b00e0313599dbfb70d

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