Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ed46ec15ac3871…

MALICIOUS

PDF

34.4 KB Created: 2021-07-08 19:29:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: efd100f347801655de3a5b5254791d1a SHA-1: d152bf9ca97d61b8c4fbda3bbcc1f3b53e5dcf6a SHA-256: 27ed46ec15ac38710e2425e988720cefd39322a12fb173f761a896e851e5faae
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-thumbnail-game-hack PDF link annotation
    • http://stitqi.ac.id/website//repository/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/get-free-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/rbx-website_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-hack-no-verification-ios_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/tiktok-free-video-download_GM835599320.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/free-roblox-followers-generator_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/coin-master-free-spins-link-blogspot-april-2021_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://stitqi.ac.id/website/repository/roblox-accounts-for-sale-free_GM431946152.pdfIn PDF document text
    • http://stitqi.ac.id/website//repository/how-to-hack-people-on-roblox_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_off00002f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F02 22388 bytes
SHA-256: 2737ffa0350c60dbce885452d084cd75b0b5b0425333a24c6dd6239cb218130e
font_01_sfnt_off000060d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D4 19336 bytes
SHA-256: adbfa614176d12f8fda67e6e8d5b73dbc28431768a4cac05a3d314a7f167f1c3

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