Malicious PDF — malware analysis report

Static analysis result for SHA-256 48ee8bbcf2e5bf22…

MALICIOUS

PDF

32.7 KB Created: 2021-07-02 03:47:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 341c619c405c97f4cdfe42be4ba50156 SHA-1: 8fbb8361224da35a87c268bb5df6241d706289ce SHA-256: 48ee8bbcf2e5bf22c95b3e7a2ba729c1d9cd96cb946abd2ade724a248534cf11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-robux-on-roblox-easy-and-fast-game-hack. The document body and heuristics indicate a lure for game hacks and free currency, a common social engineering tactic. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-robux-on-roblox-easy-and-fast-game-hack In PDF document text
    • https://www.croatia-flyfishing.com/files/tiktok-free-pro-app-download_GM835599320.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-tiktok-video_GM835599320.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/pokemon-go-free-100-iv_GM1094591345.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-spin-link_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/6-21-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-to-get-bc-for-free-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/hack-tool-roblox-lumber-tycoon-2_GM431946152.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/how-to-hack-tycoon-cash-on-roblox_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/how-do-you-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/coin-master-heaven-daily-free-spins_GM406889139.pdfIn PDF document text
    • https://www.croatia-flyfishing.com/files/roblox-paid-hacks_GM431946152.pdfIn PDF document text
    • http://croatia-flyfishing.com/files/100-free-spins-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_off00002ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AE3 21596 bytes
SHA-256: a55e62ef724c8e1186c1dd25ab886b124a39ab325489368d127d728a626824a1
font_01_sfnt_off00005a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A45 19248 bytes
SHA-256: a8d43b518b37c38186dd8c7f53be4134841d41ed2a2ba457a1b916b5bf641345

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