Malicious PDF — malware analysis report

Static analysis result for SHA-256 f565b6478c5fd8dd…

MALICIOUS

PDF

42.1 KB Created: 2021-05-16 12:31:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 895e9c19ed212cd1b032eb60349fed17 SHA-1: 2f3c1641b56f20464cc1c3e3a086cfc6af78e4d3 SHA-256: f565b6478c5fd8ddfffb8955e42ff3d6f49924e031623035b81a975e3a8ec5ae
200 Risk Score

Malware Insights

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

This PDF document contains multiple links to malicious redirectors, masquerading as free game hacks or generators. The document impersonates Microsoft to enhance the phishing lure, directing users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to lead the user to a compromised site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/479516143/free-minecraft-alt-generator-game-hack.
  • 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/479516143/free-minecraft-alt-generator-game-hack In PDF document text
    • http://io24.com.ar/images/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-bloxburg-free-money_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/is-roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://io24.com.ar/images/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/minecraft-pe-free-apk_GM479516143.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_off00004b63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B63 25116 bytes
SHA-256: 557d0c9a47fe1eab52e6258d837e81664bb37ba81356c3b5a0abd31fdda2a053
font_01_sfnt_off000083d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D8 17784 bytes
SHA-256: 66ae3cfb6d310f144f42187aaa203441353bb0cc88c1a3915b2f7a14fa3c41b8

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