Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98c61df29c8b6ac…

MALICIOUS

PDF

43.8 KB Created: 2021-05-18 00:50:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3ae5dcd52150a5e78b842afb8cdbad66 SHA-1: f0c2781ae288ae266dbec21ea54cb9f18e6baf95 SHA-256: d98c61df29c8b6ac33d8a6bc54c2db08934bf6476de111fc7829d06f5b6a6b64
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically targeting users with lures for game hacks and currency. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links to potentially unwanted or malicious content reinforces this assessment. No scripts were extracted, but the document's structure and embedded URLs indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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-villages-game-hack In PDF document text
    • http://www.drent.se/images/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/robux-app_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/how-to-really-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/hack-coin-master-net_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/arsenal-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/getrobux-come_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://www.drent.se/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.drent.se/images/roblox-help-free-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_003_off0000485c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x485C 31256 bytes
SHA-256: 2ef2a17e8afd2c71e7088bf5e122f27729d071e999d39f7f26e5b1e4fd54ec4b
font_01_sfnt_off0000899b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x899B 18044 bytes
SHA-256: a8028c0297769aa7dba6e0a54b0a1dc6e5838f70d2f821663f5d8e8c2692d7c8

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