Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e39d8df25975a6d…

MALICIOUS

PDF

35.6 KB Created: 2021-07-01 07:34:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4336131caa1092aca8a647a233f4fcda SHA-1: 6e5530b22fb6cdd4f4555a5ff9ff56466315c6f9 SHA-256: 8e39d8df25975a6de99dced056a587bcb3b23d395a3445ef1b397486f69a60e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector, that promise game hacks and free in-game currency. The document body and heuristics indicate a lure for users to click these links, likely leading to further malicious content or downloads. No scripts were extracted, but the embedded URLs and the nature of the lures suggest a phishing or social engineering attack.

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.co/app/406889139/coin-master-free-spin-and-coin-game-hack In PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/sites-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/pubg-2021-uc_GM1330123889.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/best-roblox-hacked-clients-2021_GM431946152.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/free-t-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/25-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/robux-hack-no-survey-and-no-user-id_GM431946152.pdfIn PDF document text
    • http://wavestelecom.net/uploaded_files/userfiles/files/free-coin-master-spins-2021_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_off000035fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35FD 22604 bytes
SHA-256: e323fba8877a60e3626cbfb578ca162a23eb9d1d55873ed58d50649ded6554cc
font_01_sfnt_off0000686f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686F 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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