Malicious PDF — malware analysis report

Static analysis result for SHA-256 997600fc8270417a…

MALICIOUS

PDF

34.9 KB Created: 2021-07-04 05:43:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6b59dc7f142e2a6e524746ca08fb391d SHA-1: 843b5213ff9319ebb84aaa0d70aefa5595d86999 SHA-256: 997600fc8270417a915f10fcf7ff96a62e5eb0bc61a811aff2cda06604e45c9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or free currency generator. One of the primary links, http://netcdn.tw/app/406889139/coin-master-free-spins-only-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites.

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.tw/app/406889139/coin-master-free-spins-only-game-hack In PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/freespinandcoinblogspot-com-2021-11-coinmasterfreespins_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-free-login_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/minecraft-online-free-download_GM479516143.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-jail-break-beta-cheats_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/2021-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-cheat-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-robux-generator-quiz_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-hack-2021-download_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-fnaf-rp-how-to-get-free-via_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/cheat-roblox-sound_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/free-spins-coin-master-blogspot_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://www.jonaled.com/uploaded_files/userfiles/files/coin-master-link-today_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_off0000338e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x338E 22356 bytes
SHA-256: 5e42f83b907b85ea7aba5290899dd6b02bf34287d1b13087b8da061c83b4dad9
font_01_sfnt_off0000652d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 18428 bytes
SHA-256: f57f8b21c02b66169ef231feeb17cfb16603379852549c8906bae8109884bca6

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