Malicious PDF — malware analysis report

Static analysis result for SHA-256 c71f31d26f27d45e…

MALICIOUS

PDF

36.0 KB Created: 2021-05-10 10:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4ed3f69644ca88b0834d7bba622748e8 SHA-1: 5c18faa46f3538a446ae73c0be0013385184b474 SHA-256: c71f31d26f27d45e4131ec797bdf50b4114d5d0c1b76fc3874069599311c9c6d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to a website advertising a game hack generator, a common lure for malicious content. The document body explicitly mentions 'Best Way To Hack Coin Master' and includes a call to action to access the generator. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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/best-way-to-hack-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_off00003280.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3280 25024 bytes
SHA-256: 8980e108d31632b5d6f7e62bc2acf219580e7a40ef5947b8b30cea7605f47b5a
font_01_sfnt_off00006b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B19 18308 bytes
SHA-256: efd36867875b7c9e05accf83dcfb4edd17123817e8c4c99ad8b82f7777b7703f

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