Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af398cbcb926ff3…

MALICIOUS

PDF

34.3 KB Created: 2021-06-30 00:51:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c4b960bb4923e066164c67e0a3e426ea SHA-1: f6c1f7143496ec6cda4eb7a346d59f4e426a9c22 SHA-256: 8af398cbcb926ff300817401fda116bd7387696a310ff9219966c5442e9e8835
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically targeting users interested in game hacks and free in-game currency. The primary lure is a link promising a 'Roblox Weight Lifting Simulator 3 game hack'. The document body and heuristics indicate a social engineering tactic to drive traffic to potentially harmful websites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/how-to-hack-roblox-weight-lifting-simulator-3-game-hack In PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-hack-lumber-tycoon-2-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-get-free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/roblox-free-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/ant-roblox-jailbreak-teleport-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/how-to-get-free-admin-on-any-roblox-game-2021_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-mod-apk-unlimited-robux-2021-download-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/coin-master-free-coins-facebook_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-get-headless-head-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/roblox-swordburst-2-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id//repository/tiktok-free-iphone_GM835599320.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/roblox-leaked-free-items_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/how-to-get-free-robux-website-and-group_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.baytalhikmah.sch.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/robux-hack-no-survey-mobile_GM431946152.pdfIn PDF document text
    • http://perpustakaan.baytalhikmah.sch.id/repository/hack-somone-roblox_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_off00002ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED9 21664 bytes
SHA-256: c213cdd350f5b1c26ef80d6ec84c58376181842abd858967e7a88713d8107d6e
font_01_sfnt_off00005e54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E54 19984 bytes
SHA-256: 8ec8e8e31b2eeca76c9331d888dd621cff609ab0b2684ec544b3d4b815f15673

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