Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fce91c8489c8ed9…

MALICIOUS

PDF

37.5 KB Created: 2021-05-13 05:08:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f9afe79b41d76998426c679a09561d81 SHA-1: 43c716331920a78d88c146f60c73bda69591fcc1 SHA-256: 6fce91c8489c8ed9bcf958b0a753909160a7798da9b04ef7416adb513f2aa36f
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "game hack" and embeds a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to "Coin Master" and a "CLICK HERE TO ACCESS COIN MASTER GENERATOR" call to action, reinforcing the lure. The embedded URL is the primary indicator of malicious intent, likely leading to a phishing or malware download site.

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/como-hackear-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_off000037bd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37BD 25216 bytes
SHA-256: 7bff3abaed64db6bfd2e25839c6efb8622a2f9ed56913a7ffb7dcc6d6cf4d5a9
font_01_sfnt_off00007230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7230 17976 bytes
SHA-256: 40dd236b971f40dc9e773aba28db4bcf9d666fe41fb73238afdc269e45a8876b

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