Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc9711aa86e5be1…

MALICIOUS

PDF

42.6 KB Created: 2021-05-10 23:31:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: d4bd0f518851579c9dfc7455d4df8d43 SHA-1: 2e51bef53c4d2055c9a7eceab30afbecc54b1b1a SHA-256: bcc9711aa86e5be1e0c37d42149daf8bbaaecd9416b2a7c80112d8155cbd5f69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising game hacks and free generators. The primary lure is a link to 'coin-master-free-download-for-pc-game-hack', which is hosted on a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering attack aimed at tricking users into visiting malicious sites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-free-download-for-pc-game-hack In PDF document text
    • http://hk-kan.org/images/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/hack-download_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/minecraft-java-hacks_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-online-hack-tool_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-roblox-generator_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-coins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/login-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/instant-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-free-master_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
stream_003_off00004723.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4723 26396 bytes
SHA-256: e3ed88ba95b3a89a32ea6eaee1f194fb000730490424b758f6d709b7bbe13f27
font_01_sfnt_off000083d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D7 18444 bytes
SHA-256: b0499442804c302970887a2d9cba6ef3f31768e477807758de6572ac3a0df5c2

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