Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ff945548cf9943…

MALICIOUS

PDF

35.5 KB Created: 2021-06-26 11:06:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b8c38fe3570a8ff1f18babb8da0f1f50 SHA-1: 7d69b502e3316ae71e3795f12998039b11917f58 SHA-256: 07ff945548cf994313924f897f8bce43195da098f90b3b1b024eab40e044c0e4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded URLs and text that suggest it is a lure for downloading a malicious file, masquerading as a Roblox hacking tool. The presence of 'cmd-game-hack' in the document text and the external URI pointing to a suspicious domain strongly indicate an attempt to trick the user into executing a payload. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/comment-hacker-roblox-avec-cmd-game-hack PDF link annotation
    • http://opac.salatiga.go.id/slims7//repository/tiktok-free-view-kong_GM835599320.pdfIn macro / runtime command snippet
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-roblox-promo-codes-2021-may_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/comment-hacker-un-jeu-de-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/roblox-skins-boy-free_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/2021-roblox_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-hack-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/free-robux-without-survey_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/roblox-assassin_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7//repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/how-to-get-free-robux-pc-2021_GM431946152.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://opac.salatiga.go.id/slims7/repository/free-robux-on-the-game_GM431946152.pdfIn PDF document text
    • http://netcdn.co/app/431946152/comment-hacker-PDF link annotation
    • 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_off000033e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33E0 22284 bytes
SHA-256: 4738cdd67872cec95e9443a4c79ec1e2f2ea3fb8161fa4a1e7c28d874226ceab
font_01_sfnt_off00006510.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6510 19308 bytes
SHA-256: fa0f1335fa8e24d37414debb4e1349742d6239d89f7da839c594a8a772c13d7f

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