Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc2597cbe1d9cdb…

MALICIOUS

PDF

37.1 KB Created: 2021-05-13 12:06:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 45d0adb0d923c5e71f1353d8d70f1268 SHA-1: aa16717e81e129203568694465fe6434eb1cc74b SHA-256: 2bc2597cbe1d9cdb5357e5b2b81c8d301ec67de714766db0b5cca79d88c2415e
130 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a "Coin Master Free Spin Link" and "game hack". The document body explicitly contains a call to action, "CLICK HERE TO ACCESS COIN MASTER GENERATOR", further reinforcing the lure. The primary purpose appears to be directing the user to a malicious site that likely hosts a secondary payload or phishing content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0313

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/haktuts-coin-master-free-spin-link-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_off00003527.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3527 26180 bytes
SHA-256: 121235fceabac8bb31770fe3c54bba533d1dfdad21786faf66e74a79415bf6d4
font_01_sfnt_off00007039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7039 18196 bytes
SHA-256: d21f7c9777ff22c572caba6bc61bff535e054503ba9d308437b2513133ac2854

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