Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0f4eb863633c4b…

MALICIOUS

PDF

34.1 KB Created: 2021-07-01 23:38:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b3c6ca081fb0577a88f9051741e75787 SHA-1: 2de9d8f695244837993d1a51d12666633b664ed4 SHA-256: 3d0f4eb863633c4b2fd615839cbbc9b7ebe52a8814217bf769d388adae5de112
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links to websites offering game cheats and free in-game currency, impersonating brands like Facebook to trick users. The heuristic findings indicate a high likelihood of malicious intent, specifically a credential phishing lure disguised as a game hack. The document's primary function appears to be directing users to potentially malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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: http://netcdn.co/app/431946152/chloegames-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 http://netcdn.co/app/431946152/chloegames-free-robux-game-hack PDF link annotation
    • http://perpus.i2s-learning.com/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/coin-master-2021-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/loot-box-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-mining-simulator_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-work-at-pizzqa-place-cheat_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/noclip-hack-roblox-jaibreak_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/tiktok-free-download-for-windows-10_GM835599320.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/roblox-cheat-engine-speed-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/minecraft-apk-114_GM479516143.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hack-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/info-roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/hacks-to-get-free-robux-on-roblox-in-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com//repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/free-robux-via-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-on-roblox-xbox-one-2021_GM431946152.pdfIn PDF document text
    • http://perpus.i2s-learning.com/repository/yt-how-download-script-hack-roblox-jailbreak-2021_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_off00002e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8D 22208 bytes
SHA-256: 68377f711c956c233746a4045d81e07aeb9f986c6edcac09d6841d15100784ad
font_01_sfnt_off00005feb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEB 19216 bytes
SHA-256: 7a385cab60bbaaaffe27dd73d227ae4b9ba33b8bafb00ae866440ac7dcd5bbd1

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