Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b13d6dfbaf07e9a…

MALICIOUS

PDF

35.3 KB Created: 2021-05-21 18:01:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6b933fbfe821e45bb89e2a31c63cd3a7 SHA-1: 4983cbb64e9b5a1fca405ddbbc5db6040539185e SHA-256: 0b13d6dfbaf07e9ad6d6ad1beb34d6fad344e459132ada0cf2ab00361c4fc8e3
122 Risk Score

Malware Insights

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

The PDF document uses social engineering lures, specifically promising free followers and game hacks, to entice users to click on malicious links. The document body and heuristics indicate a strong redirection to external sites that likely host further malicious content or exploit kits. No scripts were extracted, but the PDF structure and embedded links suggest an attempt to exploit user curiosity for credential theft or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

Heuristics 5

  • 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/835599320/100-free-tiktok-followers-game-hack PDF link annotation
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-survey_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_002_off00003203.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3203 24332 bytes
SHA-256: d7ce3dbc12cfa04fd293d679c724b87172d8ea5fedaa2e5d491516e60b70ebed
font_01_sfnt_off00006988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6988 17972 bytes
SHA-256: 84155866ed7fa71aaa30d31f5ec5a44d578c16e1709c4a4ec404d13a6a9385c8

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