Malicious PDF — malware analysis report

Static analysis result for SHA-256 19d1e74ccabd28b8…

MALICIOUS

PDF

32.5 KB Created: 2021-07-04 02:33:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8a1d6413742c88ce30300868670cbeaf SHA-1: a63a17fb4daa06e4818d9949575b9f0d52c3fd06 SHA-256: 19d1e74ccabd28b88286a9df5f671e6464d7e70bec73afc4bec7db28247e2ddb
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, including a known malicious redirector at http://netcdn.tw/app/479516143/free-minecraft-hosting-game-hack. The document body and heuristics indicate a lure for game-related cheats and items, likely to lead users to phishing or malware download sites. The presence of embedded URLs and the nature of the links suggest an attempt to drive traffic to potentially harmful content.

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.
  • 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 http://netcdn.tw/app/479516143/free-minecraft-hosting-game-hack In PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-hard_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-get-free-robux-for_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-printable-roblox-candy-bar-wrappers_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-printable-roblox-coloring-pages_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/minecraft-java-server-hosting-free_GM479516143.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-free-in-app-purchases_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-roblox-accounts-with-robux-list_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-koi-hack_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/admin-hack-roblox-dowload_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdfIn PDF document text
    • http://library.fikes.upnvj.ac.id/repository/tiktok-free-login_GM835599320.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_off00002dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD5 21720 bytes
SHA-256: 4bb829172564c1426de387e5a2cfffa2ffd43ed18cd3da6716e98e2e7c8d8a0f
font_01_sfnt_off00005d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 17996 bytes
SHA-256: bf6ae4c6721fa3eadf2b386a9cfec38fcd2e671f0767c49619a657aa344fd652

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