Malicious PDF — malware analysis report

Static analysis result for SHA-256 6773cd7236d117b0…

MALICIOUS

PDF

37.9 KB Created: 2021-05-23 17:10:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d14620de2eff555c3cf0389f664114f4 SHA-1: 515ffb42bbf541fdbbe310caabb4f7afca20bf50 SHA-256: 6773cd7236d117b07eb855392e9d807d56ae656923bc3003f66126796024e240
160 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, including one identified as a malicious redirector, which is designed to lure users into downloading further malicious content. The document body explicitly mentions 'Free Coin Master Spins 2021' and includes a 'CLICK HERE TO ACCESS COIN MASTER GENERATOR' call to action, indicating a scam or phishing attempt. The presence of multiple download links suggests a downloader or dropper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/free-coin-master-spins-2021-game-hack In PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://battistibrothers.com/system/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn 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_002_off0000352e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x352E 27656 bytes
SHA-256: f51dc81705808e958e7406fdc5a68e68514433f1c414b18598aa4426f349bb2e
font_01_sfnt_off000072ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72EE 18288 bytes
SHA-256: cbf21fc5c11f74798808ab0cc71af5e4bf323ced5a050f8983f0748b8c809d88

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