Malicious PDF — malware analysis report

Static analysis result for SHA-256 c50ae8464f6499ef…

MALICIOUS

PDF

34.7 KB Created: 2021-07-04 00:37:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 03860563cb086644717a1397d378a22d SHA-1: 45fc295107e988aec4ec605ad767c169deff01ff SHA-256: c50ae8464f6499ef958b4c707fc27a49e3e8ce9f3188bb95d925cee9eeb51cd3
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' and 'game hacks' to entice users to click on embedded links. The primary link, http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack, is identified as a malicious redirector, likely leading to further malicious content or malware download. The document's structure and embedded URLs suggest a phishing or social engineering attack aimed at tricking users into visiting potentially harmful sites.

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/free-robux-no-offers-game-hack In PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/roblox-project-jojo-hacks_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/how-to-hack-filter-enabled-games-roblox_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/how-to-hack-hole-in-the-wall-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-spins-coinmaster_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-free-foxy-food_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/hackear-cuentas-de-roblox-gratuitas_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/how-to-hack-roblox-counter-blox-esp-aimbot_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-minecraft-resource-packs_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/can-you-use-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-roblox_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/how-hacks-for-trading-pet-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/free-robux-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/how-to-get-100-robux-for-free_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_off000031e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31E8 22428 bytes
SHA-256: af60fe170b692e92e3434e34ed4f5073b6c8fd573d318519f05df53e1784b4ec
font_01_sfnt_off000063ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63AB 18716 bytes
SHA-256: 6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924

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