Malicious PDF — malware analysis report

Static analysis result for SHA-256 991143abf3e11118…

MALICIOUS

PDF

35.5 KB Created: 2021-06-29 13:10:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 995d7a48befd72141e427e943b7ffea7 SHA-1: 65fcadf8e34416d60b91eb93e9df46a171945fe6 SHA-256: 991143abf3e11118061d23f2855be8b65ad8fcd8e53392297e40e950c7727ce8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to a known malicious redirector, disguised as a 'free generator / game hack' for Roblox. The document body and embedded URLs reinforce this lure, aiming to trick users into clicking through to potentially malicious content. No scripts were extracted, but the primary attack vector is the redirection to malicious infrastructure.

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.co/app/431946152/nuevos-hacks-de-roblox-game-hack In PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-serious-face-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/comment-hacker-pour-avoir-des-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-hack-free-robux-hack-2021-ios-android-pc_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/cheat-for-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/synapse-roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-roblox-accouts-that-work_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-elemental-wars-hack-script_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-games-with-cheat-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-hack-free-robux-and-tix_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-account-2021-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-roblox-accounts-with-brute-force_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-hack-all-the-games-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-roblox-exploit-injector_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-obc-and-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/roblox-hack-tool-com_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-shirts-roblox-bc_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/amazon-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3283 22868 bytes
SHA-256: d0e3edd5f789a651a1c7e0ecc0d72afc1b2dafc4550b945ef00ba872967bd71d
font_01_sfnt_off00006595.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6595 19076 bytes
SHA-256: 226f26afc266007524deb0aca0501db1240eafe52f96157938c83cd8c6da032a

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