Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d7a4d6390fd260a…

MALICIOUS

PDF

37.0 KB Created: 2021-05-16 15:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: a6e670458b4cef59a53e3e6c839092b5 SHA-1: 8021354e539b4de1c7c442ef91ca6236c7e2ae68 SHA-256: 6d7a4d6390fd260a0ecedc8baa7010d1bc833b5f900a63da50b0d44caed9866d
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a malicious URL, masquerading as a game hack generator. The document body explicitly mentions "Coin Master Hack Lost World 2021" and includes a call to action to access a generator. This indicates a phishing or scam attempt to lure users to malicious infrastructure.

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/coin-master-hack-lost-world-2021-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_off0000340e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x340E 25500 bytes
SHA-256: 84b9b38a9c8b6b8603ae5af440d653c08a99919e5e52f8cecffa32c22c882f0c
font_01_sfnt_off00006e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E47 18564 bytes
SHA-256: fe6e96bee4f2349a2275eb1baf9951ec67b0217a441ba60f2b7a82c0a0005a9a

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