Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed743c94a31bec28…

MALICIOUS

PDF

45.2 KB Created: 2021-06-09 06:33:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: aaa022c1f5c6ea21ba824ca254f4c5c1 SHA-1: f813022066096cc288ae7bbbaec71d072517fea8 SHA-256: ed743c94a31bec28c7bd0a4262d0b6c10837fcd28bb7fae9b9ced08eb5327867
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure related to 'Roblox Hack' to trick users into clicking a link. The primary link identified, https://netcdn.tw/app/431946152/roblox-hack-sin-verificacion-humana-game-hack, is associated with malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a potential for client-side exploitation or redirection to a malicious site, likely involving JavaScript execution within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-hack-sin-verificacion-humana-game-hack In PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-be-a-hacker-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/apocalypse-rising-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-roblox-hack-swirlycandygurl_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/coin-hackhub-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/roblox-jailbreak-money-hack-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.smknesbu.sch.id/repository/give-free-robux_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_004_off00004f43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F43 26216 bytes
SHA-256: 09b9de2b1adc56066685d5cff61c5fde78bdc7c03466bd5ca140bd8aadf09810
font_01_sfnt_off00008c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C9B 18836 bytes
SHA-256: 72b97f999c2c1df00f46d7afe6cc86842e1dd1fa8c5ac1ed5183ff1ae84b2af8

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