Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b9248a4ecf6343…

MALICIOUS

PDF

34.0 KB Created: 2021-07-09 16:48:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 248e9f1cda9d2d764f9e99663927d31c SHA-1: bd4d60644ff8aa05d3d45a8376bd48df89cc97fa SHA-256: e8b9248a4ecf63430e46b1789b07de7ed1c8e2255bada7bac59fd825316f22a6
220 Risk Score

Malware Insights

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

This PDF file contains numerous links designed to lure users to external sites, including a known malicious redirector at http://netcdn.tw/app/431946152/free-robux-on-iphone-game-hack. The document body and heuristics indicate a focus on 'free Robux' and 'game hacks', suggesting a scam or phishing attempt. The presence of many PDF links also points to a link farm strategy, likely to distribute further malicious content or lead to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/431946152/free-robux-on-iphone-game-hack In PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-spins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/roblox-project-lazarus-zombies-hack-script_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/coin-master-free-spins-gratis_GM406889139.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://kkmman.e-learningman1bitung.com/__statics/gudangsoal/files/coin-master-hack-apk-35-13_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
font_00_sfnt_off00002eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EFF 22068 bytes
SHA-256: 2a861e7a9bd536fad78c3c38370c7d5362c59b0fb60a3aaf426d7e22e48cdda0
font_01_sfnt_off0000600b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600B 19060 bytes
SHA-256: d8417ca89321b4dfc415403c7a814e3f2ba31710bdc313f579f3c567c18c0aac