Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee31c1dc58c2690…

MALICIOUS

PDF

46.0 KB Created: 2021-06-11 10:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 21cbe8bb681902a78efbfcb0107b1cf1 SHA-1: 6adc942618211b2680b93a7d93b6df466c68418c SHA-256: 0ee31c1dc58c26904c46f4670bbe1ae72d6661493ed17e7795cf089de11038de
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to websites offering game hacks and cheats. This behavior is consistent with a malicious document designed to redirect users to potentially harmful sites. 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.tw/app/431946152/free-catalog-items-roblox-pastebin-game-hack
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-coin-hack_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/ghow-to-hack-roblox-games_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-more-spins-on-coin-master_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/download-hack-coin-master-apk_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/haktuts-coin-master-free-spin-today_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/getrobux-now_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-spin-codes-coin-master_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/code-free-robux_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-100-spin_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/roblox-pink-free-robux_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-android-root_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/blox-rewards_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-tiktok-likes_GM835599320.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-verify-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-infinite-robux-in-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005219.bin
1b89218c31bffdf7c25149bf2e170c44c8a418ebab1e0b4f319579686838f3dd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5219 26932 bytes
font_01_sfnt_off00008eff.bin
3150a6b5d74ec2a24e31dfcdc62d8e10198724b805fb6be59c9333ffa871113a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFF 19100 bytes

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