Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef2f8161a36214b…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 14:24:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d523777cd67b6bf134ad9b7b12af2c26 SHA-1: f9dc0fedd9482468eab686a2c8dca61484966ba2 SHA-256: aef2f8161a36214b3a4a1221899c32ac33fed28a374860a10dd7a20c90b9a098
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick users into clicking a link, which is a common social engineering tactic. The embedded URI and numerous other URLs point to sites offering game cheats or free items, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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 https://netcdn.online/app/406889139/coin-master-unlimited-spin-and-coin-hack-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/real-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-earning-websites_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-home_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000539d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x539D 25656 bytes
SHA-256: 89dca03cdc624eed1cd5fe5e09eacf9bb26b35f921d99e0885ba04af04cf20dd
font_01_sfnt_off00008d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D97 18584 bytes
SHA-256: c8e711e41b973747ec323a47a761701fdaf1f8f6730ed7788ccf1517fe3358ad

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