Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6733e0554e15a4…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 18:21:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9eacc2d3eea6af152b47444439226c6c SHA-1: 4eddf68199dbd29dd69cff00be8f90f4b65483e0 SHA-256: ea6733e0554e15a4262e563bce8e3b408b65a2971d45f00a31866d5793a9c787
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game hacks and currency to trick users into clicking malicious links. It contains numerous links to redirectors and link farms, including the primary malicious URL http://netcdn.co/app/431946152/free-island-in-roblox-bubble-gum-simulator-game-hack. The document's structure and embedded links strongly suggest it is part of a phishing or scam campaign, likely delivered as a spearphishing attachment.

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.co/app/431946152/free-island-in-roblox-bubble-gum-simulator-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/como-conseguir-roblox-badges-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-games-by-admin_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/dance-off-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-make-t-shirts-on-roblox-free-sell_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-adopt-me-accounts_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-hack-2021-easy_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/pastebin-robux-account-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-robux-for-free-2021-without-builders-club_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/robux-website_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_off00003262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3262 22208 bytes
SHA-256: 6dcab3663889eb7325511616881e1b08fb4fe771be92a1d9851740982c48c061
font_01_sfnt_off000063c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C2 19448 bytes
SHA-256: 69b38e27de61d6041fb5617f0e30aca44e7590e17c32dc27189648a4ab620b1c

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