Malicious PDF — malware analysis report

Static analysis result for SHA-256 802209eb5446b597…

MALICIOUS

PDF

49.7 KB Created: 2021-06-14 01:53:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4ad7c85a219d2530b8aba1a4c63c1450 SHA-1: 28e552636f41cfd32431e8bf886d348b3d9adc44 SHA-256: 802209eb5446b59740a07e91286db81aa739cc5e8c1063af156fcb6ac41b8a67
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to known malicious redirector infrastructure, specifically targeting users with lures related to game hacks. The ML classifier also flagged this PDF as malicious. The presence of a visual download button further supports the lure to click on these links, which likely serve as a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8642

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/how-to-hack-into-anybody In PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/hack-master-coin-pc_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/yarxvin-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/mcpe-download_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/guide--coin-master-free-tips_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-hack-ios-cydia_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/best-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.smklabor.sch.id/repository/free-roblox-usernames-and-passwords_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C3 25872 bytes
SHA-256: 5f5535afef74248e9f81f514f0f0fde103ca102f31ba5abeb9910424db510c1d
font_01_sfnt_off000085c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85C3 2824 bytes
SHA-256: bd082aa73fbb1a8b3bd2e5c998d3d8e31d1dfc71ea36f846af746f69a0d2ab7f
font_02_sfnt_off00008f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F72 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off00009c83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C83 19192 bytes
SHA-256: e8e344a2a37c392d7e548e008fe380769b00a571ba8e9f541ae005a24c8f5a5b

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