Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5159246e0acfee…

MALICIOUS

PDF

36.9 KB Created: 2021-07-06 16:29:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a518d84eeee6bfea91d4900344022c38 SHA-1: 56a2a6a995cdce61dfb3725dc1364b4b82a5d605 SHA-256: df5159246e0acfee108d12b846c0763c3e0394fea55b39d28564f682ac734982
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The embedded URLs, such as http://netcdn.tw/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack, lead to known malicious redirectors. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful 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.tw/app/406889139/coin-master-free-spins-link-blogspot-2021-game-hack In PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-hack-apk-iphone_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/gratis-und-sicher-free-robux-gekommen_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-apple_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/minecraft-windows-10-free-code_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-tiktok-followers-no-downloads_GM835599320.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/free-level-7-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/roblox-got-talent-piano-hack-download_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/hack-robux-no-verification-human_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-game-hack-online_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-get-a-refund-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.travelone.ae/userfiles/files/how-to-scam-on-roblox_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_off000037d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37D8 22960 bytes
SHA-256: 57d013cc08e14e0a392454baa3895dd4a32c50b6a200c1f8c61b4222d96502a4
font_01_sfnt_off00006b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4A 19036 bytes
SHA-256: f868d1b4b008750abeb491aae720fc8315e02cd8dd3bcefbbcb1193d1ab016b5

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