Malicious PDF — malware analysis report

Static analysis result for SHA-256 e92ab6f84fe5fd08…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 03:46:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: df0e35cacba2a61f09959287f88f35d6 SHA-1: 8439f0a8aa6d6d1d20c4aa5bbc40c05c6755b57a SHA-256: e92ab6f84fe5fd0894083c91d715cbf8f55a890ec1f63e3dc12a204c090437ff
182 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a fake browser/software-install lure. 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 0.9971

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.xyz/app/479516143/free-mods-for-minecraft-pe-game-hack PDF link annotation
    • http://www.hotel-seminaire.com/images/coin-master-hacks-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-game-hack-kaise-kare_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-free-coins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/how-to-get-free-robux-com_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
stream_003_off00004dd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DD8 25296 bytes
SHA-256: 9266c256a3b992dc06add914156378fb4ebe83315842d04599eb713b1902f7b4
font_01_sfnt_off000086ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86BA 18040 bytes
SHA-256: 55677d50e7f19372d6dfb723d72c398dee248f925afb4425ab44c3bb4ecd28f4

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