Malicious PDF — malware analysis report

Static analysis result for SHA-256 62441b7f6d5a0628…

MALICIOUS

PDF

47.0 KB Created: 2021-05-15 09:11:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-05-29
MD5: 0757bd64beb648317fd57ef061c19aea SHA-1: e24f0e1b735d15e24b727a917bff1dd82daf0767 SHA-256: 62441b7f6d5a0628d1abc53eb65ff213fdf212298849d95eabd472f6bf75a80f
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/get-me-robux-for-free-game-hack In PDF document text
    • https://inscastellar.cat/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://inscastellar.cat/images/wwwcoin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • https://inscastellar.cat/images/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://inscastellar.cat/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://inscastellar.cat/images/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://inscastellar.cat/images/daily-coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://inscastellar.cat/images/free-100-robux_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://inscastellar.cat/images/roblox-points_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://inscastellar.cat/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://inscastellar.cat/images/what-is-exploiting-in-roblox_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004c00.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C00 28140 bytes
SHA-256: 17c700254d341734b570d02d31d85f7d72d97df3b5e63d564968c0d2cef2df2f
font_01_sfnt_off00008b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B9A 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off0000953b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x953B 18312 bytes
SHA-256: 932e048767bb22e6267a54c454926b1d6572868c8ffb63cd4dd0c91a684054b1

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