Malicious PDF — malware analysis report

Static analysis result for SHA-256 686ccce93bf0bdb8…

MALICIOUS

PDF

33.2 KB Created: 2021-07-05 19:59:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c2be34c231fb28a996887c0ced0886db SHA-1: 2ffea2865c28061af3908104fe62c9130743cece SHA-256: 686ccce93bf0bdb84cd15ae897aede6fc98c7440ae663559789237d86fc3e490
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as a generator for game hacks and in-game currency. It contains multiple embedded URLs that redirect to malicious infrastructure, specifically targeting users interested in games like Minecraft and Roblox. The primary malicious URL identified is http://netcdn.tw/app/406889139/mcpe-master-hack-coins-game-hack, which is flagged as a known malicious redirector. The document's structure and content strongly suggest a phishing or scam attempt aimed at tricking users into visiting potentially harmful sites.

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/mcpe-master-hack-coins-game-hack In PDF document text
    • http://www.opac.stieimalang.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/give-me-robux-now_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.opac.stieimalang.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/can-i-play-roblox-online-for-free_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/edm-reaper-free-robux-april-2021_GM431946152.pdfIn PDF document text
    • http://opac.stieimalang.ac.id/repository/coin-master-free-spin-and-coins-links-2021_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_off00002e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E83 22092 bytes
SHA-256: ed68b7ec7ca1fbe0fa14c4c10d219f1428120228f09d1613e6be295ed2ddd06e
font_01_sfnt_off00005f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F69 18180 bytes
SHA-256: 92faf3057dda85b96eed63f8c940eae00c44c914698dadd2c1d3c54ade9dde20

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