Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc016cb1bb2157d…

MALICIOUS

PDF

35.9 KB Created: 2021-07-01 12:57:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f4bf18342834a6878f511f28ef95de0e SHA-1: ddeffd3f605911c942c89398a5ab64be48d9c5e9 SHA-256: fbc016cb1bb2157d19b4af3a238e8c409ca45a1843bcbe17956c4e3611805f55
82 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a LOLBin command-execution lure. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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/como-hackear-vehicle-simulator-roblox-para-tener-12.000.000-game-hack PDF link annotation
    • https://dentmate.com.tw/image/data/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-downgrade-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-bakers-valley-cheats_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/farmtown-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/cmds-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-hack-for-android-apk_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-get-free-money-in-jailbreak-roblox-2021_GM431946152.pdfIn macro / runtime command snippet
    • https://dentmate.com.tw/image/data/files/how-to-hack-roblox-account-cookie_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/robux-rewards_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/battle-royale-hacks-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-one-piece-ocean-voyage-hack_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-welcome-to-bloxburg-cheats_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/free-coins-for-flip-master_GM406889139.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/how-to-hack-jailbreak-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/image/data/files/roblox-games-for-free-unblocked_GM431946152.pdfIn PDF document text
    • https://dentmate.com.tw/imIn macro / runtime command snippet
    • 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_off0000327f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327F 22340 bytes
SHA-256: d26ca8d4f8113692b50bbbc4df5685fb45a8d2daa6b9069e1ea5b9cf51d2a57c
font_01_sfnt_off000063ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63ED 20200 bytes
SHA-256: 37867e5bd41bfbbf53f6be2fc96dc9daafd84c0244f44d5bb9e4e33a7fb71d2b

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