Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fc75169db8f5f00…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 07:08:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fbf9109ea8e21686b6876005d566d017 SHA-1: 30297201c70ce12aaee8c9c86deb8612c340c283 SHA-256: 1fc75169db8f5f00fb61f7def267f6a66c9bc0d48e2f7bf9aa5a66f3d36d2e78
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are structured as SEO-optimized links to other PDFs, suggesting a link farm designed to drive traffic. One prominent URL, 'https://netcdn.online/app/431946152/free-jake-paul-merch-roblox-game-hack', likely serves as a lure for downloading malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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.
  • 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 https://netcdn.online/app/431946152/free-jake-paul-merch-roblox-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/how-do-i-earn-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-spin-hack-pc_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-bedrock-free-download-pc_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pubg-uc-20210_GM1330123889.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-redeem_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-human-verification-and-no-survey_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
stream_004_off000051e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51E5 25344 bytes
SHA-256: c3cc46800a23cd170f33a0911f5b43c0ecb3c62a3bae0b1028db4bae5b12f038
font_01_sfnt_off00008ceb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CEB 19168 bytes
SHA-256: f1994a9307f535f095f0e9104e1c2c65231ef211478aec69bb75b6c7ff1b9a7f

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