Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a0f40091291995…

MALICIOUS

PDF

33.6 KB Created: 2021-06-30 06:41:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 749c0efa3544277753474f959f80cbeb SHA-1: f385757b45a3bae0cd646e8e04f46d59837f5a38 SHA-256: b4a0f40091291995a00e8ce7de0ee391e26e950bf3eee7dd4e9e9e53df7e7726
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a malicious link that redirects to a known malicious domain, masquerading as a game hack generator. The ML classifier strongly indicates maliciousness. The embedded URL is designed to trick users into clicking, likely leading to further malware download or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/ways-to-get-free-robux-on-roblox-game-hack In PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-coins-and-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/apk-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-roblox-blue-hats_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-images_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-parkour-hack-june-2021_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-giveaway-live_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/protosmasher-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-you-were-kicked-from-this-game-do-not-cheat_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-pe-free-apk_GM479516143.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_off00002d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D90 21756 bytes
SHA-256: c45573a369dfdbb8b7616a545c21501bdedb110092510422e3c0676d79a93e86
font_01_sfnt_off00005d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D55 19272 bytes
SHA-256: 73de6014fc0f1ee633ddd99ad1729fa2d916ae6ab530ce64a0795244219febd7

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