Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd5dd1468a4b53f…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 00:13:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 48e7702ac5687b27f30dea688fa579e4 SHA-1: 1c12c4ab4728a7ee6163eaec58c58639068913bd SHA-256: bbd5dd1468a4b53f62c6f690e8ff25311a0afe25bd5d5402a746ebea28132cb6
142 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a fake CAPTCHA lure, indicating an attempt to trick users into clicking malicious URLs. The presence of a link farm heuristic further suggests a SEO-based lure to drive traffic to potentially malicious or scam-related content. No scripts were extracted, but the overall pattern points to a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/479516143/is-minecraft-free-on-xbox-game-hack
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/www-bloxy-world-roblox-free-robux_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-can-i-get-minecraft-for-free_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-free-spins-8-14-2021_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/why-am-i-a-cheater-in-roblox-parkour_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/roblox-phantom-forces-level-hack_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/how-to-get-a-free-scarf-in-roblox_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-fan-page-giveaway_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/how-to-get-free-spins-on-coin-master-2021-iphone_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-card-hack-apk_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/roblox-hack-2021-lev-7_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-coin-master-account_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/free-minecraft-java-edition-account_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/roblox-intriga-injector-free_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/coin-master-free-gifts_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/moon-active-games_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-robux-codes-2021_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/ciawi/repository/free-custom-minecraft-skins_GM479516143.pdf
    • http://lib.bppsdmp.pertanian.go.id/main/repository/cheat-roblox-super-power-training-simulator-2021_GM431946152.pdf
    • http://lib.bppsdmp.pertanian.go.id/kupang/repository/roblox-account-taker_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003644.bin
dbca9140652f072b0c004b9ca4fd222b9d41eac52c531a30ec76c4ecb6b40eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3644 23000 bytes
font_01_sfnt_off000069d1.bin
987f99d7e2443cf381540eae1143ad62299bf58b05908f5564068197b2bc8841		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D1 18596 bytes

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