Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b8884bf91b9f881…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 06:13:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ba485d72f7248b787ae586d52b78feae SHA-1: 0f06022235343090aaab0ddb5ba0d883541a2771 SHA-256: 2b8884bf91b9f881752783b8523f366e33edaa5796d8503ab1a2ad22a7d1bc8c
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 or hack for popular games. It contains multiple links to known malicious redirectors and other PDF files hosted on potentially compromised domains. The primary goal appears to be directing users to malicious infrastructure that likely serves further malware or phishing content.

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.co/app/431946152/roblox-free-lvl-7-script-executor-2021-game-hack In PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/free-robux-no-human-verification-not-lieing_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/pubg-uc-with-easypaisa_GM1330123889.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/get-roebucks-com_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/hacks-cbro-roblox_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/free-coin-app_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/minecraft-bedrock-hacks-windows-10_GM479516143.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-free-box_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-hacks-xyz_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/coin-master-bonus_GM406889139.pdfIn PDF document text
    • http://ajmason.com/admin/ckfinder/userfiles/files/robux-hack_GM431946152.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_off00002f7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F7B 22460 bytes
SHA-256: b3f9e64aa3ce4b0acaeb0011fbd7ddb0b1fcb9c20e77fff89eaee26ecf51775c
font_01_sfnt_off000061ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61AC 19760 bytes
SHA-256: d2d8f97b6ef05c39e6bfaac9bc411fe700a071617163479bf09ca76c9625f85d

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