Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd8d43ad72eb8cf…

MALICIOUS

PDF

36.4 KB Created: 2021-07-07 20:58:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4924f2d3a56a64b8d32dc45091e884b3 SHA-1: c7f29ea82a7d03e55483dbf5e699930ea15bc2c1 SHA-256: 1fd8d43ad72eb8cf1ae6b140678aebf130710c5a27ea1b743eb4ebe7a132b1e7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The primary lure is the URL http://netcdn.tw/app/431946152/oprewards-com-login-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs suggest a phishing attempt related to in-game currency or cheats for popular games like Roblox and Coin Master. No scripts were extracted, but the presence of multiple malicious links indicates a high likelihood of user redirection to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/oprewards-com-login-game-hack In PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/roblox-trolling_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/get-robux-free-for-reel-no-get-someting-free_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/island-royale-roblox-hack-esp_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/androeed-ru-minecraft_GM479516143.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/electrification-free-robux_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/dress-up-on-roblox-that-are-no-roblox-just-free_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/roblox-shirt-template-free_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/account-roblox-free-2021_GM431946152.pdfIn PDF document text
    • https://amazingnepaljourney.com/userfiles/files/roblox-mobile-hack_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
font_00_sfnt_off00003706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3706 22636 bytes
SHA-256: e9167120457efc6813a83e2f20cc48689287ce82cd60d04bf6e994e474be9714
font_01_sfnt_off0000697c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697C 18936 bytes
SHA-256: 7041adf8518710a4413aa32982ce6c5947ef6f4aebe4e34a0e44fd0e6289633e

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