Malicious PDF — malware analysis report

Static analysis result for SHA-256 852f332eb8d7722f…

MALICIOUS

PDF

47.2 KB Created: 2021-06-13 23:24:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 311626cd6012adc0e4390dc68303d303 SHA-1: 6ac9b8f7bf29126c2662e5e457004be0edf3257b SHA-256: 852f332eb8d7722f2a98ce52818190cc46d6021a3db39fd6e49673072dcbf9ca
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The document presents itself as a lure for game hacks, specifically mentioning Roblox and Coin Master, and includes a fake CAPTCHA to trick users into further interaction. It contains numerous embedded URLs pointing to similar content, suggesting a phishing or malware distribution attempt. No scripts were extracted, but the overall presentation and embedded URLs indicate a malicious intent to deceive users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/how-to-hack-any-account-on-roblox-2021-game-hack PDF link annotation
    • http://www.sbairs.com/datas/files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/websites-for-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-spin-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/watch-videos-for-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/hacks-for-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-hacks-for-gold-cards_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/no-scam-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/coin-master-70-spin-link-today_GM406889139.pdfIn PDF document text
    • http://www.sbairs.com/datas/files/roblox-adopt-me-hack_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
font_00_sfnt_off000049e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49E9 27376 bytes
SHA-256: d756a8b1a2e7e6a13f41330d74513c69357e1b907aca6c867033218b1dfcb90c
font_01_sfnt_off00008945.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8945 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00009341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9341 19172 bytes
SHA-256: 0a7e104d5ecfc95001c2fec9af84766da75c2f23ece79c6ff95580c56c9070bb

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