Malicious PDF — malware analysis report

Static analysis result for SHA-256 7127a0b460fe5660…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 11:21:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a1a2fb7f4878656157d114ab1d412966 SHA-1: 10b345fc275dae2426ba2c706ed813942112477c SHA-256: 7127a0b460fe566010f192380564087b1b3ae9c5dcb210cea9ca14623d455566
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as free game hacks and generators. The document body explicitly contains the URL http://netcdn.tw/app/431946152/free-robux-clothes-game-hack, which is also flagged by heuristics as a malicious redirector. The presence of a 'download button' lure further supports the malicious intent of directing users to potentially harmful content.

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-clothes-game-hack In PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/how-to-get-free-robux-2021-on-computer_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/robux-gratuits-rapidement-cheat_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-hacker-john-20-000-robux-gems-jarvascript-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-apk-mods-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-unboxing-damage-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-free-draw-script_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/appbountynet-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-steves-one-piece-hack-devil-fruit_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/treasure-hunt-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/minecraft-client_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/hacks-for-boulevard-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pa-jember.go.id/repository/free-robux-software_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_off00002f6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6F 22068 bytes
SHA-256: b227cb9333d04c06fbfb3491996d9b09a03e0089a63f154610b9b3f192696aab
font_01_sfnt_off00006082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6082 19060 bytes
SHA-256: 97364360b0ef57788754a1eb8a616304bf845de832d3f27808b1c0193cfeafc1

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