Malicious PDF — malware analysis report

Static analysis result for SHA-256 94858892e147c6ba…

MALICIOUS

PDF

34.6 KB Created: 2021-07-04 01:36:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: d250c521b16db5ac35c10eaf87b93d83 SHA-1: ac9aa00bf9ca271ba2341a879b5dc85439f05f77 SHA-256: 94858892e147c6bab787d8a4c64a32b4ffb9864b9ff8767f7a7afb6bba2677a4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and free currency generators for popular games. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to lure users to click on malicious links. No scripts were extracted, but the primary attack vector is the embedded malicious URLs.

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-hack-2021-iphone-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-legends-of-speed-hack-pain-exist-descargar_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux-5-million_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-character-codes_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/give-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-accounts-with-no-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-24-7-minecraft-server_GM479516143.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-hackers-list_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-its-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/bloxpink-free-robux_GM431946152.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_off00003039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3039 22804 bytes
SHA-256: 17044e968c6198bf58923c1e7a7e8459bbe523543d627bd28a7fa2b6cfc34212
font_01_sfnt_off00006323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323 18748 bytes
SHA-256: 5292eadd0a2604e2a8ea7855d7ad376fc3942d93536e78ffe249df210ec73899

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