Malicious PDF — malware analysis report

Static analysis result for SHA-256 76114704f9f724c6…

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 23:10:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f16c06befed3f5f604baa03063b606f2 SHA-1: 51e1a8dc2b01d408e4701225f2d20b5a3d420c32 SHA-256: 76114704f9f724c65e72cca13aeaf0f8ea55a310ccbb40eb2d59082887412d67
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure and a clipboard-command (paste-and-run) lure. The file routes users through malicious redirector infrastructure and 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 6

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.tw/app/431946152/how-to-change-roblox-username-for-free-game-hack PDF link annotation
    • http://alsworld.com/uploaded_files/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/coin-master-free-spins-link-today-twitter_GM406889139.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/este-hack-de-robux-funciona-2021_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/ho-to-get-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/free-robux-no-verification-on-laptop_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/free-robux-books_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/hack-roblox-hack-online_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/how-to-get-free-robux-credit-card-generator_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/free-rainbow-wings-roblox_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/how-to-get-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/free-death-eater-flight-roblox_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/how-to-get-robux-for-free-no-generator_GM431946152.pdfIn PDF document text
    • http://alsworld.com/uploaded_files/userfiles/files/roblox-money-cheats-free_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/my/tasksIn 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_off00003163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3163 22464 bytes
SHA-256: 96e49fbaa5e041a115c2a1ac269799899cc18495cbe75dd7bfb34f76eca87e6a
font_01_sfnt_off00006397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6397 19240 bytes
SHA-256: f3cfe40ff9bd13452b535b9c372db0919eaf0c35b929878a2988ec76d4edfb2d

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