Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa25322c276e5603…

MALICIOUS

PDF

35.5 KB Created: 2021-05-22 03:41:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a7bd9a59f33fddc0f3659a935d4b49b6 SHA-1: e8e06f47a94a9cfaa5d380393801a5160841c7cb SHA-256: aa25322c276e5603146149dafddfe619058e8a9034f80ec84cd30089e9cb1d4d
160 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs and a visible "download" button, designed to trick the user into clicking a link for a "Coin Master Hack". The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a malicious redirector workflow, likely leveraging client-side exploits or JavaScript to achieve its goal.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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-without-verification-2021-game-hack In PDF document text
    • http://properteez.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/minecraft-free-download-no-virus_GM479516143.pdfIn PDF document text
    • http://properteez.com/images/cpbildco-robux_GM431946152.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_off000030ba.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30BA 24172 bytes
SHA-256: ef79cd8c8cb73a801df56b992f6be11a265d8b19b0bc30da15e3a556ec7cc881
font_01_sfnt_off000067f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67F0 18756 bytes
SHA-256: 1f8069b8e373c1677ee696ae61803aee5e0941708a1ef93a03d88c08535d6ef3

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