Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b1679a6fa776f1…

MALICIOUS

PDF

50.1 KB Created: 2021-06-11 13:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e24389b22c9c3189eb8fb49588a2bfd7 SHA-1: a618a7ae0ec1d1a364990b7fa5ae70e6eb37b14d SHA-256: 38b1679a6fa776f1cc2783f6a9eeb8dab301384eccd266a8bb5045a02ed4cf3c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to game hacking, specifically for Roblox, directing users to a URL that likely hosts a malicious payload or phishing page. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs further supports a malicious intent to redirect users. No scripts were extracted, limiting the analysis of specific execution techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9789

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 https://netcdn.tw/app/431946152/how-to-hack-and-get-a-free-item-in-roblox-game-hack PDF link annotation
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/minecraft-bedrock-edition-pc-free_GM479516143.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/robux-in_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-top-get-free-robux-without-verify_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-robux-images_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/hack-roblox-one-punch-man_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/body-roblox_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/murder-mystery-free-code-knife-games-roblox_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/roblox-free-name-changer_GM431946152.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/coin-master-hack-tips_GM406889139.pdfIn PDF document text
    • https://pdiperjuanganbali.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005779.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5779 26788 bytes
SHA-256: 4c0ed74c8d8b910fdf4fee749c2c446c6e9c694c1df89a32e1d60676b45f8b5b
font_01_sfnt_off00009511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9511 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC2 19048 bytes
SHA-256: 0871ef2c7f473081e401f26780a200c3e07feab8ac739173dcbdf0458b2c1e17

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