Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8b80c68d0d90bb…

MALICIOUS

PDF

34.2 KB Created: 2021-06-18 20:27:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8c8ecfc7ac2240483f6403b23a701cd7 SHA-1: 72225d95782fa0c71a062adb87687a0b61e4fc77 SHA-256: 9e8b80c68d0d90bbeed34b2595c4b741089e596f45599e8fb060661a6b03de4f
160 Risk Score

Malware Insights

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

The PDF contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/www-free-roblox-hacks-net-game-hack. This infrastructure is used to lure victims with promises of free game hacks or generators, likely leading to further malicious content or exploits. The ML classifier also flagged this PDF with high confidence.

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/www-free-roblox-hacks-net-game-hack In PDF document text
    • https://www.manmed.info:443/images/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/minecraft-wurst_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-robux-id-roblox_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-free-robux-july_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/tiktok-views-free_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-game_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-game-hunters-club_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-hack-tool-ios_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/como-instalar-hacks-para-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/oprewards-robux_GM431946152.pdfIn PDF document text
    • https://www.manmed.info:443/images/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • https://www.manmed.info:443/images/tiktok-free-unblocked_GM835599320.pdfIn PDF document text
    • https://www.manmed.info:443/images/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.manmed.info:443/images/free-spins-october-28-2021-coin-master_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_off00002d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D85 22824 bytes
SHA-256: 25964c370305f586c2ab8314ff0aceebb3b89035a824b97710e58ccfccd69533
font_01_sfnt_off00006062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6062 19100 bytes
SHA-256: 2207bf6c170640477f433753c8c7cd182a4474aedb3b812c1a57945ee90d7b8f

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