Malicious PDF — malware analysis report

Static analysis result for SHA-256 404a5131d693f26c…

MALICIOUS

PDF

33.8 KB Created: 2021-06-27 13:16:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: f004e7e400d589ba2212bb3251b37f84 SHA-1: b86bb52db55d6a6cddc537f66a5178c6bd3d40bb SHA-256: 404a5131d693f26cc73d1d7cd640fc6d1c5e1498f51fbb82a2fca4438082c66c
100 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising 'free Robux'. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the target URL is associated with malicious redirector services. The document body and embedded URLs suggest a lure for obtaining in-game currency or cheats, which is a common phishing tactic. No scripts were extracted, but the presence of malicious links indicates an attempt to lead the user to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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/free-robux-rxgate.cf-game-hack In PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-united-nations-siterobloxcomgames_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-casterly-rock-free_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-spins-for-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/tiktok-free-package_GM835599320.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-free-spin-codes_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-trolling_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-free-unblocked_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-gift-card-free-delivery_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-cards-hack-2021_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-promo-codes-2021-october-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-lumber-tycoon-2-hacks_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_off00003166.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3166 21228 bytes
SHA-256: f5388b904ef6a85989976adca5a591bfef03357da6e9a85249942ca90f16ac7b
font_01_sfnt_off00005f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F85 18888 bytes
SHA-256: 85daeb0d27a6bec5f1cf01c7475fd41468cce1781ea6355bc2fb0b722d589514

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