Malicious PDF — malware analysis report

Static analysis result for SHA-256 970a6ab7f0c926cd…

MALICIOUS

PDF

33.2 KB Created: 2021-07-06 00:22:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 24c689666ea688c5976852759cbe14c5 SHA-1: 0110896662247b1deace4b91bf031ba7d15fde60 SHA-256: 970a6ab7f0c926cdef68f4f11750dcc402f2147ecf67398af78518e8db26c624
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.tw/app/431946152/roblox-hack-unlimited-robux-game-hack. The document body explicitly mentions 'Roblox Hack Unlimited Robux' and 'CLICK HERE TO ACCESS ROBUX GENERATOR', indicating a lure for users seeking in-game currency. The presence of embedded URLs and the ML classifier's high confidence score support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-hack-unlimited-robux-game-hack In PDF document text
    • https://pustaka.mic.sch.id/repository/neon-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-pets-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/click-this-button-for-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-face-roblox_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/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hack-para-tener-robux-gratis-en-roblox-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-and-spin-link_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/most-popular-roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/hack-for-roblox-project-pokemon_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/genewin-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hack-2021-2387202142-robux-infinitos_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-hack-people_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_off00002a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1F 22300 bytes
SHA-256: 5e662eae84043f18fabc0d42ebc81eb51564566e5b2873303248f0a06b5c2e8c
font_01_sfnt_off00005bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBB 19452 bytes
SHA-256: c21e99ebfc9f7e5f39e71a68abf279300e15561c35a4934f0c8f70bb34e99d3b

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