Malicious PDF — malware analysis report

Static analysis result for SHA-256 9088efd18c57ba56…

MALICIOUS

PDF

34.8 KB Created: 2021-07-03 12:11:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 6564ea0fbe09977cdc0af69909de7670 SHA-1: 1ea023e6341d42a13a192b284931db991343cb13 SHA-256: 9088efd18c57ba5657c82d79f14257416ea8e455e8e229501d364d81b59aa85c
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell T1203 Exploitation for Client Execution

This PDF document employs a common lure of free game hacks and currency to trick users into executing commands. The document body and embedded links promote 'free Robux' and similar cheats, directing users to potentially malicious redirectors. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, which could be used to download and execute a second-stage payload.

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.tw/app/431946152/free-robux-hack-no-human-verification-or-survey-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/game-stealing-service-free-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/hack-counter-blox-roblox-offensive-download_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-tiktok-followers-com_GM835599320.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/the-streets-roblox-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-cheat-engine-scripts-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-2021k-robux-no-password-obby_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-rocitizens-money-cheat-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/pokemon-go-free-shop_GM1094591345.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-galaxy-shirt-free_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-free-gamepass-script-october-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-hack-weight-lifting-sim-in-roblox_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-332-apk-free-download_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_off00002fdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDD 22212 bytes
SHA-256: e2776f21df1192ed742f5ad33007a3674fde1cfc12d014051107106e3af0a34b
font_01_sfnt_off000060e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E5 19796 bytes
SHA-256: ad19e1b0895485c37a49fe02fea69dabec772aaf5d58694ea1046abdc2ebb73d

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