Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4bc406664d4bdc…

MALICIOUS

PDF

34.8 KB Created: 2021-07-04 11:27:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cd44b1339b93189ae3851a1133ce2fd6 SHA-1: 04c45c20222daa30423cab5cc4f6e6b5c87692bd SHA-256: 2a4bc406664d4bdc0379abe09cbbf838e1f2b77dcf9179c8e2c7f5452ebbffc4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/lazyblocks-com-free-robux-game-hack. This redirector is likely used to funnel victims to sites offering scams or further malware. The document body and embedded URLs suggest a lure related to free game currency or hacks, a common social engineering tactic.

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/lazyblocks-com-free-robux-game-hack In PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/get-more-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-pocket-edition-free-ios_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-a-cape-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/hack-the-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-spins-and-cards_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/minecraft-java-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-pins_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_off000030ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EE 22076 bytes
SHA-256: a31e2325d8e124d07c83dec76f3188fb6e2b1121a9bf69b4d3bfe89b2d4adc01
font_01_sfnt_off000061c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C0 19480 bytes
SHA-256: d59a65bdecbb5c87bb70f1067a6075a20336de1a5b550eccc1c41dc66eb6c340

Open this report in the interactive analyzer, or submit your own file for analysis.