Malicious PDF — malware analysis report

Static analysis result for SHA-256 2750d72ce4ba393f…

MALICIOUS

PDF

42.2 KB Created: 2021-05-11 02:32:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b9802112060ff719ab63ff0e14c29359 SHA-1: 4dddb43d003c8ef6ff2abed6721e17c448af5274 SHA-256: 2750d72ce4ba393fa8c7b9e35365f3adbd9b7c1a5d85131c07d48bcb803472d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are structured as a link farm. One prominent URL, https://netcdn.xyz/app/406889139/hack-coin-master-apk-3.2-download-game-hack, is identified as a malicious redirector. The document body also contains text related to game hacks and downloads, reinforcing the lure. The presence of a visual download button further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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
  • 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.xyz/app/406889139/hack-coin-master-apk-3.2-download-game-hack In PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-games-with-free-radio_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-new-cards-hack_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/robux-earner_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-coin-and-spin-app_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/where-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spins-save_GM406889139.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_003_off00004953.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4953 24292 bytes
SHA-256: e46ce8736f4effa85886a40aec75154ee51b160847c4057ce83e849011aa4356
font_01_sfnt_off000080cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80CF 18836 bytes
SHA-256: d746a7c1c5cf5be311eddf8676cfb9402845d24e0d8fc8e00b27a1d9de62f851

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