Malicious PDF — malware analysis report

Static analysis result for SHA-256 4552ce108e502b31…

MALICIOUS

PDF

47.2 KB Created: 2021-05-10 18:00:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b05bace685a009a32e085bfaee43d500 SHA-1: 9588c033bbb0f7e4a3fc5c7957755920c9c8802e SHA-256: 4552ce108e502b31e7321e840cb4b5e374d90cf66f936dde4eb70bec1334b100
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector, that promise free Robux or game hacks. The primary lure is the URL 'https://netcdn.xyz/app/431946152/free-robux-generator-no-survey-no-download-no-human-verification-game-hack', which is designed to trick users into clicking. The document body and embedded URLs reinforce this theme of scams related to in-game currencies and hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/431946152/free-robux-generator-no-survey-no-download-no-human-verification-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-ios_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-scam_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-offers_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/roblox-hack-ios_GM431946152.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_off00004e36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E36 24328 bytes
SHA-256: 0cee9fb5748bbe111ea9a7d18623eeb6e5e3884e9604fa16a7a9fd6db7f74093
font_01_sfnt_off000085d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85D9 3500 bytes
SHA-256: e49a868379cd3c37e631c5a53c010e21f38d803532a2b8417aee82315d4e8634
font_02_sfnt_off0000917a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x917A 19736 bytes
SHA-256: 3cea6d4f9da734904bcc55369e0b79f4621aa36195ab65246c463812034b9480

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