Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac49ad59b2949197…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 11:44:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e115d9a627ca25d778e2c9051e8ba53c SHA-1: 2041047f00404bb5e80a2856bfcb7142f162e265 SHA-256: ac49ad59b2949197c068de74dbaf625547eef7ac414acabb08c9ff26aec939b6
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Free Spins Daily' and game hacks. The ML classifier strongly indicated maliciousness, and the presence of a download button lure reinforces the deceptive nature of the document. The primary attack vector appears to be luring users to click on the malicious URL, which likely leads to the download of a second-stage payload.

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.tw/app/406889139/coin-master-free-spins-daily-game-hack In PDF document text
    • https://creationegyptco.com/userfiles/files/dll-hacks-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-a-free-shoulder-pet-in-roblox_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-online-hack-download_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-dex-explorer-hack_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-coins-for-flip-master-online_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-vip-server-roblox-build-a-boat-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-juwelen-hack-mad-paintball_GM431946152.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
stream_002_off000030ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30CA 23488 bytes
SHA-256: e9e52bce0755879ced30b7cec6047fad9fc2437fd49f91e3b4dcb312a3e0289b
font_01_sfnt_off0000661b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661B 18596 bytes
SHA-256: 9b8358e598e07f7d28a63a566b047adfcbccaa59c97f3816d59e3cdcc62e8d14

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