Malicious PDF — malware analysis report

Static analysis result for SHA-256 041dde79344df040…

MALICIOUS

PDF

34.2 KB Created: 2021-07-03 15:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 094e8404ee8cf33b8bd4869da97184bc SHA-1: aa19cb6c31cea27567ebb446fc0e805a33d3dd86 SHA-256: 041dde79344df0404e86230366813d39239a7f1d404df22a0134489420cd0185
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a high-priority lure to 'http://netcdn.tw/app/431946152/finally-roblox-free-gifts-game-hack', which is designed to trick users into believing they can get free game items. The ML classifier also flagged this PDF as malicious. The presence of these lures suggests the document is part of a phishing or scam campaign, likely leading to a malicious download or a credential harvesting site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/finally-roblox-free-gifts-game-hack PDF link annotation
    • https://dribledasortegaucho.com.br/uploads/files/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/https-wwwrobloxcom-games-2021202196-freeubersummerrewards-go-play-now_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/hack-roblox-mod-apk-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/dfield-free-robux_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/roblox-pokemon-cheats_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/free-robux-hack-download_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/growboxnet-free-robux_GM431946152.pdfIn PDF document text
    • https://dribledasortegaucho.com.br/uploads/files/roblox-free-robux-script_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_off00002fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD2 21996 bytes
SHA-256: c0a3bbb0592c85484b6453f0a448aba4ecc5134f488a95e0bce0902d37430002
font_01_sfnt_off0000609e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x609E 19052 bytes
SHA-256: edb5d4dfaa081dab46f4abdaafa49a958152d92b80756620984b4bed2765bf01