Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2612bfef8b7c148…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 18:40:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9ba42b35a41ffe89e1c0f6c64d1afc34 SHA-1: 0133f68e33af340a4201c481c95cca8ae6d58cf2 SHA-256: e2612bfef8b7c148de7b0571108b0f304143930e789d28a4d7a2b2619f0b6ae5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically advertising free game currency or hacks. The primary lure URL is https://netcdn.xyz/app/431946152/free-robux-app-2021-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/free-robux-app-2021-game-hack In PDF document text
    • http://5prudov.ru/images/real-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/minecraft-dungeons-download-free_GM479516143.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://5prudov.ru/images/free-roblox-executor-no-key_GM431946152.pdfIn PDF document text
    • http://5prudov.ru/images/coin-master-free-coins-amp_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
stream_003_off00004858.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4858 25904 bytes
SHA-256: d52357cb991cac6a6042c52e751626b4395c45cc44bfb52f56a62d183a185dde
font_01_sfnt_off0000855c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x855C 18592 bytes
SHA-256: 60f15d8ca37119d38c609a47832113b3700b54b9c09a2f40fa09148dabf0e544

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