Malicious PDF — malware analysis report

Static analysis result for SHA-256 3061a2ef6b83baf1…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 23:47:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 6865de9a154b390bea3385470398ed57 SHA-1: 5dad9f0a5c30d435bbdc91bd5ac2e0c9a493d2cd SHA-256: 3061a2ef6b83baf16942dca7e4c78b849dc3e26ba838211e279cf765964dd051
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links designed to lure users to external sites, many of which are part of a link farm. The primary redirector URL, http://netcdn.tw/app/431946152/how-to-get-free-robux-easy-game-hack, is flagged as malicious. The document body and heuristics indicate a scam related to free game currency and hacks, likely intended to lead users to further malicious content or phishing pages.

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/431946152/how-to-get-free-robux-easy-game-hack In PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-spin-coin-master-app-download_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-get-free-robux-on-a-ipad-2021_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/roblox-bloxburg-building-hacks_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/counter-blox-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-unicorn-stuff-roblox_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/coin-master-coins_GM406889139.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/how-to-have-free-animation-on-roblox_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/www-pastebin-com-raw-free-robux-v5_GM431946152.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • https://ponturipariuri.pro/ckfinder/userfiles/files/earn-robux-by-watching-ads_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_off0000309b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x309B 22124 bytes
SHA-256: 0a80662494af22434859ff116fe643a42b687ad1928a34e78a18a0366fc2c406
font_01_sfnt_off00006177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6177 19164 bytes
SHA-256: 0d91da27a3fd2071a1294b90674c0de4394c4ddf99a76a86a264892d4088a75d

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