Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca337a96ede397e8…

MALICIOUS

PDF

35.9 KB Created: 2021-07-04 12:53:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 65cac33bca21021954665b021179e1f8 SHA-1: 3e25663825c67e1b48c9e2fb1fbddcfe6a248a74 SHA-256: ca337a96ede397e88a1c9b578156902a70859d84a31842bf0aa5a42e486df8c7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.tw/app/406889139/coin-master-link-for-spins-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk/repository/ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-make-a-free-admin-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-roblox-gameplay_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-profile_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-lovenet_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/cheat-buddy-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-ninja-masks-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/survivor-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-minecraft-java-code_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-giver-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-fedora-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-get-free-robux-on-roblox-2021-no-hacks_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/john-doe-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/hack-de-roblox-traspasar-paredes-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-shirts-in-roblox-catlog_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hoe-to-get-extra-free-spins_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/tiktok-free-wifi_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-hack-client-18-9_GM479516143.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_off0000354c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x354C 23192 bytes
SHA-256: 0013f4a9bba058ffa3efd0d7c90fe476407b9134f7446039dbbfa151df20ec0c
font_01_sfnt_off0000699f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699F 18344 bytes
SHA-256: 6ad1108e81c5525844192ddb13ab38111abd218b87fc7994796a13e0178d8bfd

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