Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcf2822a9c7ccff…

MALICIOUS

PDF

43.4 KB Created: 2021-06-04 02:42:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0daff32faa15a028b806c34d92d076fd SHA-1: 158e6143a17595885d87b4ce981af25e1272a0a3 SHA-256: 1fcf2822a9c7ccff0bdf9dd6006ffb5ef4a31d4196c93ff0842708b9d44b8cc9
82 Risk Score

Malware Insights

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

The PDF document contains a lure impersonating Facebook to trick users into clicking a link for free Robux. The embedded URL, https://netcdn.online/app/431946152/tofuu-free-robux-game-hack, leads to a credential phishing site. The document's structure and embedded URLs suggest it is designed to facilitate initial access via social engineering and user execution of a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/tofuu-free-robux-game-hack.
  • 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.online/app/431946152/tofuu-free-robux-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pubg-uc-official-price_GM1330123889.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-time-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/need-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-free-spin-daily-bonus_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-fan_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-hack-pc-free_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-spin-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/twitter-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-monster_GM406889139.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
stream_004_off0000500b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x500B 24268 bytes
SHA-256: 5bbecc0f1bddad3d2143437898d1142e8caf0b7c6982cd40bef354d3e766e23b
font_01_sfnt_off000087bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87BC 18012 bytes
SHA-256: dac13bf77d5f9f281899d476697fa3ba8f238a27b6e950de43e832ee48c5c806

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