Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e5cc3d293477a8b…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 12:11:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b7b00464586e74fb4d35a5a4498f394a SHA-1: a6f42076bcfcedac55f974205fd0dfc7fcc73c84 SHA-256: 1e5cc3d293477a8b47cbb8e1def5154656b0d43a38e5b39a1eb9f67682cc012c
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to distribute malicious content. The primary URL points to a "Coin Master Mod Apk" which is likely a lure for downloading unwanted or malicious software. 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/406889139/coin-master-mod-apk-latest-hack-with-unlimited-free-spins-game-hack
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-generator-tool_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/moon-active-games_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/best-minecraft-hacks_GM479516143.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-mod-version-free-download-v344_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/free-spin-link-coin-master-today_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/websites-to-get-free-robux_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-roblox-money_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-robux-glitch_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-free-spins_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-apk-hacked-3526_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdf
    • http://perpus.ar-rum.ac.id//repository/free-robux-legit_GM431946152.pdf
    • http://perpus.ar-rum.ac.id//repository/coin-master-links-free-spins_GM406889139.pdf
    • http://perpus.ar-rum.ac.id/repository/roblox-pink-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005056.bin
0d8702bdba2386641dd18518462b1b3c44a57202b45d059bf76b24fc8b1c6a39		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5056 26580 bytes
font_01_sfnt_off00008c70.bin
ec39511f044db0039b033061d0c06de0ea4b06e85abf4e03074bae323e4248a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C70 19116 bytes

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