Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8ce05009b13a90…

MALICIOUS

PDF

34.4 KB Created: 2021-05-20 13:34:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 63bdd376fbf1b37fab7b213343d396ea SHA-1: 7b76fbee1e235324bbe3cd467b861fa0dd3de495 SHA-256: 4f8ce05009b13a906d99319b3929235eb75e21f4171d8d369bcb964ae7c3bde7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically promoting "free generators" for games like Minecraft and Coin Master. The ML classifier also flagged this PDF as malicious. The embedded links likely lead to further malicious content or phishing pages, attempting to trick users into downloading malware or divulging sensitive information.

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/479516143/free-minecraft-com-game-hack In PDF document text
    • http://firesafetyservices.biz/images/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-32-android-mod-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003069.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3069 23616 bytes
SHA-256: 64868f2d3f5f3f12117d36a309ce0af691b5dcefd039b9311b23771817aee0e6
font_01_sfnt_off000065f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 17968 bytes
SHA-256: 1b4885c2af39899205e5d90bbae948db42423f4b52ef91d34878d66166ac5d9f

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