Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f85f6c09395808…

MALICIOUS

PDF

35.0 KB Created: 2021-07-03 22:25:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 14948a193dab59b731b3b65195735046 SHA-1: e33b75de176c56f7694b0762347e363c6ea10b56 SHA-256: d6f85f6c0939580879f8504265e19a74e124cbfa3cd6fa30407c4ba04949834a
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hack generators or free currency sites. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. The document body and heuristics suggest a focus on 'Coins Master' and similar game-related lures, consistent with social engineering tactics.

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/406889139/coins-master-hack-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/como-hackear-coin-master-2021-espaol_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-hack-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/rbx-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/como-hackear-coin-master-gratis_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_off000033ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33BA 22908 bytes
SHA-256: 71e26d6f963ca9741cb4f0a7ef4c3ba1defdc800feb1360aae73999e6297937e
font_01_sfnt_off0000671c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x671C 18004 bytes
SHA-256: 0f5586fad8963a3d66dcc08ea216a344d94ecc2f9eb49a7a48818ccd749a571f

Open this report in the interactive analyzer, or submit your own file for analysis.