Malicious PDF — malware analysis report

Static analysis result for SHA-256 1875d95b05ef7b96…

MALICIOUS

PDF

34.4 KB Created: 2021-06-21 00:32:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6a3a15c144ffff2cbfff6215ae499e11 SHA-1: 79a7a319ed8ed0b7a5ee182ec0ede6821faa4e4d SHA-256: 1875d95b05ef7b9671f9b2660471a8a2eddcf5a8de3aea8a6ba9a7a9e88d16d8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users to click on embedded links. The primary link, http://netcdn.co/app/431946152/pc-robux-hack-game-hack, is identified as a redirector to potentially malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs strongly suggest an attempt to deliver a secondary payload or phish for credentials.

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.co/app/431946152/pc-robux-hack-game-hack PDF link annotation
    • http://bepquannhu.vn/upload/editor/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-tiktok-accounts-with-followers_GM835599320.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/i-dont-feel-so-good-sim-hack-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/hacker-pants-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/pubg-uc-shopee_GM1330123889.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/xray-hack_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/2021-roblox-reach-hacks_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-treasure-hunt-sim-hack_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/free-robux-games-no-scam_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/roblox-cookie-hack_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://bepquannhu.vn/upload/editor/files/rbx-free-robux_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_off00002fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE8 22420 bytes
SHA-256: 02e1c69eca5493fc6e1bcabd0345d3d8e6f83e93113e8de9a1574e5525948639
font_01_sfnt_off000061f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F3 18876 bytes
SHA-256: cd395e8ea6d0cbba4560efde21c3d50e5eaeb3f512307686171001efcd310dc7

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