Malicious PDF — malware analysis report

Static analysis result for SHA-256 92af5271f526c9b4…

MALICIOUS

PDF

34.9 KB Created: 2021-05-22 05:18:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 02f41c36614ec42a340c56f52a990b0e SHA-1: ef3ac774e8be0bf4cd58793f016f42adf6ee2251 SHA-256: 92af5271f526c9b4c9a92e1e02e7c9596afa68991dff38344fabd1ec925bfd13
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as a "Coin Master Free Gifts" generator. The document body and heuristics indicate a lure to a fake generator, likely to download further malware or phish for credentials. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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-free-gifts-game-hack In PDF document text
    • http://possumholler.us/images/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/download-coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/get-robux-com_GM431946152.pdfIn PDF document text
    • http://possumholler.us/images/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://possumholler.us/images/coin-master-free-daily-spins-and-coins_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_off0000309e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x309E 24464 bytes
SHA-256: 4c82ca37d90c0f8c792c9b3ef37d7a7ed080cd426aca1ca41a6b49ac2f417b9c
font_01_sfnt_off000068a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A9 17712 bytes
SHA-256: 401d56b29285354d6954c3c26e793cbeb56329cdc5209d9139ec018457d4ba23

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