Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf22b426d932d69a…

MALICIOUS

PDF

36.4 KB Created: 2021-07-05 13:10:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f43ae11a6d1d1e0c6d05f06fbc37ae5d SHA-1: 6e985e7887dc63829d2697567e7fb39c7cb340ff SHA-256: cf22b426d932d69ae8f7f92d38f6e7b2b6518ef3755c14d93e8c1bb7efe1cdd2
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are part of a link farm designed to attract users searching for game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a call-to-action button further supports a deceptive intent. The primary goal appears to be directing users to download potentially harmful files from external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-spins-and-coins-haktuts-game-hack PDF link annotation
    • http://librarystkippgribl.com/repository/robloxcom-robloxplay-now-for-free_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/rape-simulator_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pokemon-go-free-hack-ios_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/dracosword-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-code-robux-no-fake_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/online-coin-master-hack-here_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/free-robux-without-downloading-a-game_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/pokemon-go-free-gifts_GM1094591345.pdfIn PDF document text
    • http://librarystkippgribl.com//repository/how-to-hack-pubg-mobile-unlimited-uc-without-human-verification_GM1330123889.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://librarystkippgribl.com/repository/coin-master-hoe-to-get-extra-free-spins_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_002_off000034ec.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34EC 23684 bytes
SHA-256: b456317db60c408329e1b395288ebe3d6e8ea7bce32b2c8e62bcd8e5f7ea598a
font_01_sfnt_off00006a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A97 18656 bytes
SHA-256: 2d759c9c8811e6c0575dd1569354feb394dafb387e5a2f9a3fadbada3c585f82

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