Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1e0645d063f61ca…

MALICIOUS

PDF

45.5 KB Created: 2021-05-14 21:05:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f70f87007a00a81545587a3155c6824e SHA-1: 379f8cab92746e2d37bfb0833d6a8596fbaf93f4 SHA-256: e1e0645d063f61cad13f584c2be27360ff57088b751d440d587d8073622afb1d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a known malicious infrastructure, specifically promoting 'free game hacks' and generators. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded links suggest a social engineering lure to trick users into visiting potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/431946152/how-to-get-free-robux-on-android-game-hack In PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/100-free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/robux-free-c_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.highsecuritykwt.com/uploaded_files/userfiles/files/roblox-free-online-game_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_off00004b85.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B85 24852 bytes
SHA-256: 88b32336540aa9821cc70bc5f2980e20b7ce5b21f97772aeddd73c44e7bf6c67
font_01_sfnt_off0000849a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x849A 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4C 18576 bytes
SHA-256: be12fe34256d848f1a7db569f7882c3333b0548de7731ecd127307da0fa566a6

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