Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dfc75fe11cc9b0…

MALICIOUS

PDF

42.4 KB Created: 2021-05-14 17:06:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: b507163e0742250787eb9165fdfbc249 SHA-1: 33f7127b9df78bf76e67ec5ca888c7f936fce830 SHA-256: 94dfc75fe11cc9b084233d642e1f202dd916e2ff23d3052de34337905d2f6973
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free generators, directing users to a known malicious redirector. The document contains a large number of links, many of which point to SEO-optimized PDF files, suggesting a link farm or content spamming operation. The primary malicious URL identified is https://netcdn.xyz/app/479516143/how-to-get-minecraft-for-free-on-chromebook-game-hack, which is likely used to distribute further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/how-to-get-minecraft-for-free-on-chromebook-game-hack In PDF document text
    • https://bazilikum.com/images/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/worst-client_GM479516143.pdfIn PDF document text
    • https://bazilikum.com/images/free-robux-live_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://bazilikum.com/images/hack-coin-master-mod-apk_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/hack-coin-master-online-without-human-verification_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/wurst-download_GM479516143.pdfIn PDF document text
    • https://bazilikum.com/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://bazilikum.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • https://bazilikum.com/images/free-minecraft-wallpaper_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
stream_003_off00004ad4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AD4 24792 bytes
SHA-256: 917c91849b28d1110220333ab2fe997ec6b23c98c543b8be38028de3acbb4f5c
font_01_sfnt_off0000827f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827F 18628 bytes
SHA-256: 3a4e3f8378819557dde5b27ff4793c702252829ac96e9550bc2b3bfa5905855e

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