Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf19115709ff190e…

MALICIOUS

PDF

33.8 KB Created: 2021-07-05 05:19:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 535da79fecc7cd0a66b470a165405c67 SHA-1: 8ab9bac6504d05763103859704e55cbc5f19c935 SHA-256: bf19115709ff190e0d700ffbc222b118420201b7e449ee863e090ea83c6e2b12
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector, which is designed to lure users into clicking on game hack or generator content. The primary link, http://netcdn.tw/app/406889139/coin-master-free-spin-best-link-game-hack, is associated with known malicious infrastructure. The document's structure and embedded URLs suggest an attempt to trick users into downloading or navigating to malicious sites, likely as part of a phishing or malware distribution scheme.

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-spin-best-link-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-simulator-hacks_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cranberry-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/10-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-cheat-engine-mac_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-for-chromebook-free_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/easy-cheat-codes-for-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-generator-no-human-verification-real_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-adidas-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-remotes-roblox-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-cheat-engine-bypass-june-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-yourself-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-real-free-spins_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-use-winrar-for-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/impact-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-get-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheat-codes-roblox-mad-city-money_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-apk-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_off00002eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEB 22228 bytes
SHA-256: 8cb730c4b38dda305d1ec872b28d236604720febea0baede54a4079dd392df8c
font_01_sfnt_off00006084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6084 18560 bytes
SHA-256: ccfb5d92fbe5a8c4b075095db266853413677baa480e55bd209d365c44e31cbc

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