Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f83444da8fb2faf…

MALICIOUS

PDF

54.7 KB Created: 2021-05-19 09:11:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 153c3619e2f4d8bfe4cf5665e551dc92 SHA-1: 6a82e291fd80bfd21e81ec1376f71e01f0e78589 SHA-256: 1f83444da8fb2faf2ac87b667f92ee0dffef0ed2863ed5f98bb69956f40fcd84
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains links that redirect to a malicious website, likely as part of a phishing or scam campaign. The document body and embedded links suggest a lure related to free game items, such as Minecraft hosting or Robux. The presence of multiple links to known malicious redirector infrastructure and the ML classifier's high confidence score indicate a malicious intent to direct users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8874

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-hosting-game-hack In PDF document text
    • http://falconshipping-uae.com/userfiles/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-free-spinv1-0apkpure-com-apk_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/descargar-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/robux-download_GM431946152.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/spin-link_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://falconshipping-uae.com/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d2c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D2C 28316 bytes
SHA-256: c4cc2c0086c16f900d34c41aea9ce0944c99cee1551a92c36b55a4ea9beef80a
font_01_sfnt_off00008cd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD3 7936 bytes
SHA-256: 218d53b68bdddb064f6fba4be822d5b3725ed1cef1a3b42796a8dd99c4a62f4e
font_02_sfnt_off0000a5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FD 4232 bytes
SHA-256: ab6320ab342704d2c5943abfba82ed4837bf2da871c91621741fd4cfd15c6ed5
font_03_sfnt_off0000b48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB48A 17996 bytes
SHA-256: bf6ae4c6721fa3eadf2b386a9cfec38fcd2e671f0767c49619a657aa344fd652

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