Malicious PDF — malware analysis report

Static analysis result for SHA-256 e73d70da2705cc19…

MALICIOUS

PDF

44.3 KB Created: 2021-05-17 17:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c3633db5edbb80e50bcaf855ab511cd0 SHA-1: 78b42ea335f2179ce1fb279f281cca09911bf04a SHA-256: e73d70da2705cc19ac78a06514e5bd4489a9b477d67b28e597943b06b9967257
200 Risk Score

Malware Insights

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

The PDF contains multiple links to redirectors and game-related lures, aiming to trick users into downloading further malicious content or visiting compromised sites. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document may also instruct users to execute commands, suggesting a multi-stage attack. No scripts were extracted, but the overall pattern points to a downloader or redirector used in phishing campaigns.

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 https://netcdn.xyz/app/431946152/how-to-hack-any-roblox-account-game-hack In PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-coins-for-planet-master-game_GM406889139.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-people-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/get-robux-today_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-premium-free_GM431946152.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://www.kpu-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.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_off00004b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B55 27544 bytes
SHA-256: 7ae0617f2f97c0676d947da6111c3ccef89dce473250207b7a1e82fbd4f9dafc
font_01_sfnt_off00008946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8946 18772 bytes
SHA-256: d5ac01ba848f85c7af00746e0b4ab9643e0d1d2f53353368de6e0e250a854553