Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c805a0da0b81a6e…

MALICIOUS

PDF

46.5 KB Created: 2021-05-12 02:44:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 540d662b8cb0f482bb7e85a0c09877bf SHA-1: 4ac6b51c4c722cef9f564208aecd4af101ec8ed8 SHA-256: 1c805a0da0b81a6ee5d4b8a2fae05c55b4bfd73ebf73f193353fd0d122d7aa21
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to a known malicious domain, masquerading as a "Coin Master Real Hack". The heuristic firings indicate that the PDF is designed to lure users into clicking these links, likely to download further malware or engage in scams. Although no scripts were explicitly extracted, the nature of the embedded links and the lure suggest a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/406889139/coin-master-real-hack-game-hack In PDF document text
    • http://www.dciprotection.ca/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-free-coins-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/roblox-heroes-online_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/minecraft-116-apk-download_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/minecraft-mod-menu_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://www.dciprotection.ca/images/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://www.dciprotection.ca/images/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://www.dciprotection.ca/images/robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004d02.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D02 27064 bytes
SHA-256: 5afb6257b12b4f42da18f43829aa40bb4a31920a61a8226648bc99ef13156a7c
font_01_sfnt_off00008b27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B27 2824 bytes
SHA-256: 381f6d859be141449dd645f7be1484d2a1cf49218dc471b402dae69eaa2b11d5
font_02_sfnt_off000094ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94CA 17788 bytes
SHA-256: 17f046e272c8ee70cc4b817224b52c180b33e2590cfcc2d916d545b5a6c5f49a

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