Malicious PDF — malware analysis report

Static analysis result for SHA-256 21d105611baa73de…

MALICIOUS

PDF

34.4 KB Created: 2021-06-26 03:49:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9aecdbedb9b58c4c6768e80a5f6f2631 SHA-1: c911018e7168353016f0a4863a3e344930997174 SHA-256: 21d105611baa73de5623bbaee8ffa3fdef7d7c94f1dfa1df940a9da76de00093
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector, specifically advertising 'game hacks' and 'free generators' for popular games. The document body and heuristics indicate a social engineering lure, likely to trick users into installing malware or visiting a phishing page. The primary malicious URL identified is http://netcdn.co/app/431946152/cheat-roblox-lumber-tyccon-game-hack.

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.
  • 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
  • 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.co/app/431946152/cheat-roblox-lumber-tyccon-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-doge-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-items-for-1m-instagram-followers_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hack-para-roblox-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/phantom-forces-roblox-dll-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-scripts-for-games-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/charlie4-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-mobile-24-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-dont-sign-up-for-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-cheats-to-get-2021-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-use-oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/rbx-hut-promo-codes_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
font_00_sfnt_off00002eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB3 22408 bytes
SHA-256: 9efbb148d5decedbfd7f1fca5bbf603cd7e574b75140d6abe8e5d49980b08ac0
font_01_sfnt_off0000608b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608B 19336 bytes
SHA-256: 0587a1870812bd294bdb57cbed0ac13ed996b3a1793e78ceee917e644f7308ac

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