Malicious PDF — malware analysis report

Static analysis result for SHA-256 e06ea4180c7a433d…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 05:13:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 7bb3bbd1436f35e8601f87e7f37d2497 SHA-1: 67cce839f12603386f048509745d9c8c56e4adcc SHA-256: e06ea4180c7a433d9673bee3a53af7281b4f71c6abc6ba57682973b55df6cd48
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links designed to lure users to websites offering 'free generators' or 'game hacks' for popular games. The primary link, https://netcdn.online/app/431946152/free-robux-earn-game-hack, is flagged as a malicious redirector. The document also hosts a large number of SEO-optimized PDF links, suggesting a link farm intended to drive traffic to potentially malicious or scam-related content. The ML classifier strongly indicates malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/free-robux-earn-game-hack In PDF document text
    • http://mbbs.hr/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://mbbs.hr/files/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • http://mbbs.hr/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://mbbs.hr/files/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://mbbs.hr/files/freerubux_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-daily-gift-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • https://mbbs.hr/files/coin-master-free-spins-glitch_GM406889139.pdfIn PDF document text
    • https://mbbs.hr/files/minecraft-iphone-free_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_off00004eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EED 27420 bytes
SHA-256: ef91db43083a90022f5727770965b50e6f36247aeaa4feca30fa7d30a3e2cef4
font_01_sfnt_off00008c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C70 18244 bytes
SHA-256: b6014a1bf70a80b5b7176295bd11553985cf3fccea183fb301f46a2e8db4226f

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