Malicious PDF — malware analysis report

Static analysis result for SHA-256 461d9fd2f5fc2086…

MALICIOUS

PDF

43.3 KB Created: 2021-05-14 03:18:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 10790c33d3f90e25d410b79303e3aabf SHA-1: 8def63d01fbdff9a958829bccd1f0712b53ff662 SHA-256: 461d9fd2f5fc20863c40334f091748bcdf16663c917125676e03af3253224ce8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting a 'game hack generator' for Coin Master. The document body, though partially corrupted, contains references to this lure and the malicious URL. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites.

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-free-download-for-pc-game-hack In PDF document text
    • https://masseymotorcars.com/images/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-cheats-and-hacks_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/minecraft-tower-defense-2-hacked_GM479516143.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-heaven-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/robux-today_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://masseymotorcars.com/images/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/coin-master-free_GM406889139.pdfIn PDF document text
    • https://masseymotorcars.com/images/how-to-get-free-robux-for-real_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_off0000492f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x492F 27244 bytes
SHA-256: 0819dffbcc75195d8be5752e3913c4794ca5f21b4c5d8e3b575e7b8d6fbe3ed9
font_01_sfnt_off000086a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A6 18444 bytes
SHA-256: b0499442804c302970887a2d9cba6ef3f31768e477807758de6572ac3a0df5c2