Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2104f4791e40cb…

MALICIOUS

PDF

42.8 KB Created: 2021-05-16 22:04:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afcfd5abc2ad0293fe87457678844ab8 SHA-1: 52282963a4cb0ac539b116209e3d265dd98b3b26 SHA-256: 4c2104f4791e40cbbe1e2f68f24a9573c7964970aa70eec78ca916b2609bf117
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free currency, directing users to a known malicious redirector. The embedded URLs and document content strongly suggest a phishing or scam attempt designed to trick users into visiting malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-spins-and-coins-unlimited-free-game-hack In PDF document text
    • https://www.ausecus.com/images/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/free-minecraft-server-maker_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/wurst-mc_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-free-spins-5-10-2021_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/coin-master-cheats_GM406889139.pdfIn PDF document text
    • https://www.ausecus.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://www.ausecus.com/images/minecraft-pe-015-0-apk-free-download_GM479516143.pdfIn PDF document text
    • https://www.ausecus.com/images/free-spin-links-coin-master-2021_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_003_off0000484b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484B 26748 bytes
SHA-256: d577e0d54e2106aca8b8ffed1d4daa83d8a5fe91d4d018299c5b365688480684
font_01_sfnt_off000083ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CE 18752 bytes
SHA-256: 9894c068b10d635aa02e8d25afb59d141e90fd875449b50e52c6a3fbfc43112a

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