Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ba244df7f3684e…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 06:10:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b77f34cc1f6f5a2a92a70525124480f7 SHA-1: 95e0d515da8260196bbadb30902c61103c403649 SHA-256: 18ba244df7f3684ea6db1347850732b47e64e17abddb10f4d775395739d4e7f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and game-related lures, such as 'Roblox Hack Me'. The ML classifier also strongly indicated maliciousness. The document body and heuristics suggest the primary goal is to redirect users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/roblox-hack-me-game-hack In PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/snack-factory-tycoon-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/google-moon-active_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-free-spin-redeem-code_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-hack-2021-free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/free-online-games-for-pc-similar-to-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/how-to-give-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana//repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/roblox-cheat-enginescript-injector_GM431946152.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/coin-master-game-android-free-download_GM406889139.pdfIn PDF document text
    • http://stiepariperpus.web.id/sarjana/repository/hack-de-roblox-jailbreak-2021-dinero_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_off00003387.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3387 21856 bytes
SHA-256: 3827ba0a3c043329b5c1b89cfcc6c67932c74799bd3201f564d875cfd16dfbdd
font_01_sfnt_off000063d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D1 18852 bytes
SHA-256: ae5bbd1016d3eca5969145279625dbf0af4bdaae54505d1f649a6545bf5fde29

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