Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cd030b8d34a925f…

MALICIOUS

PDF

44.6 KB Created: 2021-04-23 13:20:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 122ce30f4ddb5c805e2bb0a8a2a3d367 SHA-1: 44d1a8fef1e6ff60934affba4bd63eb7673bbc87 SHA-256: 5cd030b8d34a925fadb3ac730214f6f74907882b6463b7c9349e467627d21e5f
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1553.005 Security Software Installation

The PDF document contains multiple lures related to game hacks and free in-game currency, directing users to external URLs. It also explicitly instructs users to disable security software, a common tactic to facilitate malware execution. The ML classifier strongly flagged this PDF as malicious, supporting the observed social engineering techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9863

Heuristics 6

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://netsecure.top/app/431946152/before-the-dawn-roblox-free-play-online-game-hack PDF link annotation
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/youtube-ninja-animation-free-roblox.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-waiting-instant-robux.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/roblox-hack-r.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/how-to-hack-kl2-on-roblox.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-pin.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/pastebin-raw-free-robux.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/robux-hacks-inspect-way.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/roblox-free-admin-house.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/bl4z3-games-free-robux.pdfIn PDF document text
    • http://manegeri1kotatasikmalaya.sch.id/__statics/gudangsoal/files/free-roblox-bazooka.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000040e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x40E3 26780 bytes
SHA-256: a9adbdbef3baf97cf87200d876a5c60e57f65e411b17de18b03689caddd73948
font_01_sfnt_off00008011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8011 2900 bytes
SHA-256: 7709f4ae3af7d4a4200348b42e6c2c4d7e9d243aef769681d20f194ea17eaa1d
font_02_sfnt_off00008a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A14 19128 bytes
SHA-256: efc860a55b5b631ce17853fcd4d336d1ba44e7c0c898a291d0158c3afe1e6c46

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