Malicious PDF — malware analysis report

Static analysis result for SHA-256 0581788a46d90baa…

MALICIOUS

PDF

47.1 KB Created: 2021-05-11 22:04:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e1f80fae5ac27084b996be078717af1d SHA-1: 422a1475c672eb7eaafe8da1026f766eb4e91144 SHA-256: 0581788a46d90baa2f95a69b78f5c8fddf296a3110494277aeb8de739d89b830
142 Risk Score

Malware Insights

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

The PDF contains numerous embedded links and a document body that promotes 'Robux Free Gift Card Org Hack', indicating a lure for free in-game currency or gift cards. The heuristic 'PDF_SEO_LINK_FARM' and the presence of many external URLs suggest a link farm designed to redirect users to potentially malicious sites. The 'SE_PAYMENT_REDIRECT_LURE' heuristic further supports the idea that this document is part of a scam, aiming to trick users into fraudulent transactions or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.xyz/app/431946152/robux-free-gift-card-org-hack-game-hack
    • http://www.pspmrsmlangkawi.com/opac/repository/free-coin-master-spins-link-download_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-apk-july-2021_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/claim-free-robux-button_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-generator-for-kids_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-spin-in-coin-master_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coinmaster-spin-ml-link_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-download-ios_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-hack-roblox-2021_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-pastebin_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-hack-software_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/free-robux-com-roblox_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/cm-spins_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/coin-master-free-spins-link-today-new_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/como-conseguir-monedas-infinitas-y-tiradas-de-coin-master-hack_GM406889139.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/minecraft-free-exe_GM479516143.pdf
    • http://www.pspmrsmlangkawi.com/opac/repository/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c4e.bin
6e5d425ea75f94650db9fa599078f48596bad3ec0a6dfcc3f173039eedb70701		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4E 25764 bytes
font_01_sfnt_off000086ae.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AE 3884 bytes
font_02_sfnt_off00009355.bin
bb2bfd1b5c80cb1744cd57562806e4410c1e72fb9e1ed3dff7cfd9b3dcead9ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9355 19096 bytes

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