Malicious PDF — malware analysis report

Static analysis result for SHA-256 2453e842e70e993a…

MALICIOUS

PDF

34.5 KB Created: 2021-07-04 00:47:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 02a1c26f335052e95f700ddcb6159a00 SHA-1: e7216789f55b50a4ab9a7e79f8b8600d896e889c SHA-256: 2453e842e70e993a58504d147b6efad31a7b431ccceecca2dafb8111cae13a32
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/406889139/free-spins-for-coin-master-app-game-hack, which is flagged as a known malicious redirector. The document's content and structure strongly suggest a phishing or scam attempt designed to trick users into visiting malicious 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/free-spins-for-coin-master-app-game-hack In PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/hack-download-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/roblox-scripts-hack-mad-city_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-windows-10_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-daily-fb-champion_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/roblox-oof-sound-free-download_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-blog_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/mega-nz-roblox-hack_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/minecraft-pocket-edition-hack_GM479516143.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/hack-generador-de-robux_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/hack-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/best-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/roblox-free-synapse_GM431946152.pdfIn PDF document text
    • https://balibalotour.com/new/public/ckfinder/userfiles/files/minecraft-free-ios-2021_GM479516143.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_off000031ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FF 22584 bytes
SHA-256: e38a9f61d03a2a9a6f19565be6370cb47266ac63f9709c95e47c5880b35c1dbb
font_01_sfnt_off000064a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A5 18176 bytes
SHA-256: 3801bf7a1deb8554b037031e06bdefc56ff30112f6b39d510dbb5cf942fa8267