Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b946967a345b58c…

MALICIOUS

PDF

46.1 KB Created: 2021-05-11 21:37:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: f3ac87c415f4b7335de84302eefe1c64 SHA-1: b7b062029b46f5db9183a8e15881ba7d94d1c617 SHA-256: 4b946967a345b58c1bbc7b1935d4d157b8ff6e5d6c67c28e3f88ef65f96a5bda
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple links to known malicious redirector infrastructure, specifically targeting users with lures related to game hacks and free currency. The document body and embedded URLs reinforce this lure, directing users to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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 https://netcdn.xyz/app/406889139/coin-master-free-spin-codes-game-hack In PDF document text
    • https://creationegyptco.com/userfiles/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-download_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-girl_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-hack-apk-35-8_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/http-bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-now_GM431946152.pdfIn PDF document text
    • https://creationegyptco.com/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e4a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E4A 25108 bytes
SHA-256: 257ba3c3180a2b969d4ee8b8752aba09eeb61697e7e46cde504a13c8affe3d2b
font_01_sfnt_off000088a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A6 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00009246.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9246 18060 bytes
SHA-256: 6c6954b9f81c735a5c4580de4c42457a99792272849cec4d30b191d18cdb5601

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