Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4fa988496d8a91f…

MALICIOUS

PDF

36.0 KB Created: 2021-05-12 19:06:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5812362bbe82305ae8f5425930b051cd SHA-1: 0956a8d18dbaab2d28d44b5547b5ee9276822a5d SHA-256: c4fa988496d8a91f84656d29cdc20dbc43db97d174fe4fa60e7e3b0549420ffc
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" and a prominent call-to-action button, directing users to a malicious URL. This URL is associated with known malicious redirector infrastructure, indicating an attempt to deliver a payload or conduct phishing. The document's content and embedded link strongly suggest a social engineering tactic to trick users into visiting a dangerous site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0228

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-pc-free-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_off000034b4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B4 24596 bytes
SHA-256: feefec97275c126ae996fb1f97b3b4b612c9855464268adbb08788c65183edb3
font_01_sfnt_off00006c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C49 18036 bytes
SHA-256: d1e417f8400c4227caca57c80f12745841979f8062967c06e5a64cb2220bf511

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