Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99af051ecaf61ff…

MALICIOUS

PDF

51.2 KB Created: 2021-06-04 03:34:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dd7da50b2befcb677791cd353b7bb7cb SHA-1: 1820d7dadac63cb6e994e9bfc7cd93dbec5bac8f SHA-256: c99af051ecaf61ffca0381a1a3fbd6b582d44f6d9c9d7c1dc5d7bd8a7b890c1c
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs social engineering by presenting a lure related to 'free Robux' and game hacks, directing users to external URLs. The presence of numerous links, identified as a 'PDF link farm', suggests an attempt to distribute malicious content or redirect users to phishing sites. The ML classifier strongly indicates malicious intent, and the document's structure points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9713

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 https://netcdn.online/app/431946152/how-to-get-free-robux-easy-game-hack PDF link annotation
    • http://suaedy-library.net/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/roblox-script-executor-free_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/wurst-client_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-coin-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://suaedy-library.net/repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://suaedy-library.net/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F86 26932 bytes
SHA-256: 2d2f9b3102631741c35e72efe1cb8060fc9ebabd88273fd022f042b021318c7c
font_01_sfnt_off00008caf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CAF 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9695 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3A7 18688 bytes
SHA-256: afa93f6b5b78c11c56913a3e0021d293f85f1b4278f41e2b8713ad9a89f051de

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