Malicious PDF — malware analysis report

Static analysis result for SHA-256 89777eb4b3ec7c20…

MALICIOUS

PDF

35.2 KB Created: 2021-07-01 06:42:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1776aa1f897f0e163f24250ab7f21d22 SHA-1: b9e09aea925ace1a89e709cc5a0120e4a666718a SHA-256: 89777eb4b3ec7c2092f13a20a326f9afb77b9e38a7c9c49e6ab56edefb08fa19
142 Risk Score

Malware Insights

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

This PDF document employs a common lure of 'free Robux' and game hacks to entice users. It contains numerous embedded links, including one pointing to 'netcdn.co', which likely serve as a redirector or lead to further malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • 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 http://netcdn.co/app/431946152/how-to-get-free-robux-without-human-verification-game-hack PDF link annotation
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/how-do-you-hack-roblox-for-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/roblox-how-to-cheat-on-fantom-forces_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-roblox-glitch_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/how-to-test-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-promo-code-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-obby-no-password-2021-link_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/hack-para-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/roblox-robux-hack-pastebin-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/roblox-girl-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/roblox-1-hit-kill-hack-the-ninja-way_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/can-you-get-free-robux-on-your-birthday_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/como-conseguir-robux-gratis-sin-hacks-con-dos-links_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/hack-para-todos-los-juegos-de-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/how-to-get-free-vip-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-doge-outfit-on-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2jombang.sch.id/__statics/gudangsoal/files/free-robux-real-2021_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
font_00_sfnt_off000030a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A8 22320 bytes
SHA-256: 1792ae03971595c0b0d8bc3e548a4ca0c6054c8f3e1f65676e632e25f516bdaa
font_01_sfnt_off00006239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6239 19860 bytes
SHA-256: 495fe8ab67ccc92980b130970b14ca59a4055a895de5252c8ccba287623abf67

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