Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee1df3840dbcbb4…

MALICIOUS

PDF

36.0 KB Created: 2021-07-05 05:06:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: aa54629c26a51942e4ffd13e4b462845 SHA-1: 6d272315aebd96a865caa80dbfc376b9de29517c SHA-256: 9ee1df3840dbcbb4e89fc726023a13e9aa733c8f511e220d08aaf1f1d8bc9f85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL, http://netcdn.tw/app/406889139/coin-master-free-spin-link-today-2021-game-hack, is flagged as a malicious redirector. The document's content and embedded links strongly suggest a social engineering tactic to drive users to potentially malicious websites, likely for further exploitation or credential harvesting.

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-spin-link-today-2021-game-hack In PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/my-roblox-girlfriend-cheated-on-me_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/como-hackear-una-a-gente-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-points_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-unlimited-spin-and-coin-hack_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/robux-hacking-code_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-hack-into-peoples-accounts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/robux-only_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/roblox-devil_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spin-links-december-30-2021_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/coin-master-free-spins-and-coins-app-download_GM406889139.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/tiktok-free-download-for-iphone_GM835599320.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/pubg-uc-lucky-draw_GM1330123889.pdfIn PDF document text
    • http://windhorsetrek.com/userfiles/files/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003365.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3365 23076 bytes
SHA-256: 60990145b93e5fd0b52e30aa8d1202aa29a0f42375771f83e7b612c07b92c0f6
font_01_sfnt_off0000676c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676C 19100 bytes
SHA-256: 87948dd456158924639af78db2b6f448ba4bec773812a2cc2fa62bc058a3e5dd

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