Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa5ed3a9f193c5d…

MALICIOUS

PDF

35.4 KB Created: 2021-06-30 23:18:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7c4b9291ae86621298b1287cf622bb19 SHA-1: a9daf169c19644bc5f6363966e09461d547d85c7 SHA-256: 6fa5ed3a9f193c5d7e621d04a7d107fc0a467211eda9bc506c8526d33d91e296
200 Risk Score

Malware Insights

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

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items or hacks. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may also instruct the user to copy and paste content into a command-line interface, suggesting an attempt to execute further malicious code. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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
  • 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/how-do-you-get-free-robux-on-roblox-game-hack In PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-hacks-fo-pc_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/mario-64-roblox-rom-hack-code_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-hack-cbro-roblox_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/rbxcity-free-robux_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-hacks-vermillion_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-o-get-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-link_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/haktuts-coin-master-free-spin-link_GM406889139.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_off00003166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3166 22716 bytes
SHA-256: 96083f358e5b12e2c0223a99c6d146701646e48251a601c1c47992f49c4787e0
font_01_sfnt_off00006422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6422 19388 bytes
SHA-256: bfe8901ed3b01612589fbf5cddaaa2e97b8ca06efec900f58c792d736f26eaab

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