Malicious PDF — malware analysis report

Static analysis result for SHA-256 c24e839a759e6eab…

MALICIOUS

PDF

45.0 KB Created: 2021-06-03 22:05:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4528ee52bcb40f93c96c353df4303419 SHA-1: e095a27303539048742030112d900ee68f6de748 SHA-256: c24e839a759e6eabd9711639f1ad82676b2bb879d7922a096c733a78c132513e
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is designed as a lure, using game-related themes to trick users into clicking links. The primary link redirects to a malicious infrastructure that hosts a large number of other PDF files, suggesting a link farm or a distribution point for further malicious content. The ML classifier strongly supports the malicious nature of this PDF.

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/406889139/links-for-free-spins-for-coin-master-game-hack In PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-snacks-link_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/roblox-free-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/unlimited-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-spin-ios_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/robux-2021_GM431946152.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/best-free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://www.js100.com/uploads/ckeditor/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E6 28956 bytes
SHA-256: 0cb81e1fd7bfc29b53774db2c2e76f06d20aef16f910a3f25261485169ac8e29
font_01_sfnt_off00008e14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E14 18056 bytes
SHA-256: 09cd9e464d76e3a3385f879857787e36dec082617c88c9984b9580abc08ffa43

Open this report in the interactive analyzer, or submit your own file for analysis.