Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d8e4921ccc5cc94…

MALICIOUS

PDF

32.9 KB Created: 2021-07-05 16:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7547448789cf27d8f62d1c52643c46fc SHA-1: 268cf2633c0e189ad3f490c72d72759545276f97 SHA-256: 9d8e4921ccc5cc942330c72f14030546359b097f8ecfe1a14f0c5e1d8f9dc50e
180 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to websites promising free in-game currency and hacks, such as 'free-robux-no-offers-game-hack'. One of the links points to a known malicious redirector infrastructure, and another uses a raw IP address, indicating a high likelihood of malicious intent. The document's content and embedded links suggest a phishing or scam attempt designed to trick users into visiting potentially harmful sites.

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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/free-robux-no-offers-game-hack In PDF document text
    • http://118.98.227.172/opac/repository/free-robux-without-verification-2021_GM431946152.pdfPDF link annotation
    • http://118.98.227.172/opac/repository/how-to-hack-someone-on-roblox-2021-2021_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-free-webcam-overlay_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-how-to-get-rubux-hack-free_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-hack-with-cheat-manager_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/coin-master-hack-mod-apk-2021_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-robux-2021-real_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hacks-for-legends-of-speed-roblox-download-pc_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/hack-peoples-accounts-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/roblox-how-to-hack-filtering-enabled-games_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/how-to-hack-tycoon-cash-on-roblox_GM431946152.pdfIn PDF document text
    • http://118.98.227.172/opac/repository/claim-coin-master-free-spins_GM406889139.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_off00002cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC4 21584 bytes
SHA-256: 09302f3c5608680480e5efbf7ff95e78521dbd20a5c3abe2661ccb9c1ed744ee
font_01_sfnt_off00005c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C38 18716 bytes
SHA-256: 6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924

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