Malicious PDF — malware analysis report

Static analysis result for SHA-256 915547dcae7f384d…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 03:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: db6885a88661dc1c3ef74dd250d2fc17 SHA-1: 6a06723dcb18f3e466403325f07421c9639eedd9 SHA-256: 915547dcae7f384da0ac945ad62ebda2b6fb7f4f8e6e2cfd272f0ed831833632
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that point to a known malicious redirector infrastructure, specifically http://netcdn.co/app/431946152/free-gamepasses-roblox-game-hack. The document body and heuristics indicate a lure for game-related cheats or currency, a common tactic for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/free-gamepasses-roblox-game-hack In PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/free-base-terrain-roblox_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/minecraft-pe_GM479516143.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/minecraft-dungeons-free-download_GM479516143.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/roblox-kill-hack-script-fe_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/robux-hack-me_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • https://www.sses.com.sa/uploaded_files/userfiles/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D6 22048 bytes
SHA-256: 4105f0872372fe4ad11c398dfe6fec7c551dd46878651e5b4a766777d50cb080
font_01_sfnt_off0000628b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628B 19088 bytes
SHA-256: 64d7b6454192b5df29f50c9a9646015a531a0e998321ef5771301683502b10bc

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