Malicious PDF — malware analysis report

Static analysis result for SHA-256 62ebe2452b0561f1…

MALICIOUS

PDF

36.7 KB Created: 2021-07-09 01:54:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1cab6a5685cd8159ce771563116e37a6 SHA-1: 06c42228a3e4eb0cf2b29faed3d374d628d3913a SHA-256: 62ebe2452b0561f13641e417381fa09100d4b3a219d5a5f79d0411be1252cd35
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically promoting game hacks and free in-game currency lures. The primary link, http://netcdn.tw/app/406889139/coin-master-free-spins-23-march-2021-game-hack, is identified as a malicious redirector. This suggests the document is part of a phishing campaign designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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 http://netcdn.tw/app/406889139/coin-master-free-spins-23-march-2021-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-daily-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-500-free-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coun-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/roblox-girl-hair-free_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-bedrock-client_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/2021-roblox-hacking_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-come_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-do-u-get-robux-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E35 22516 bytes
SHA-256: 823dd9bc1e3e5f6e906ed0f7cc6733cdbfafb7c89ff2ac0adc2e3921276e3320
font_01_sfnt_off0000609d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 2896 bytes
SHA-256: c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
font_02_sfnt_off00006a82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A82 18916 bytes
SHA-256: 008a1dada2030376c016ae30411f6d2bb685e8d12afdbcca1e7bec21a4d131df

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