Malicious PDF — malware analysis report

Static analysis result for SHA-256 12bc51fcdecf51db…

MALICIOUS

PDF

42.2 KB Created: 2021-05-12 20:33:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b04c9b34454f8d3d0f4d71fb7434af89 SHA-1: a9b0e6e9eb67cf360476d36f8f9948f10c788838 SHA-256: 12bc51fcdecf51dbfb0ff174409048a08a9cc23c65759829f08ad77db9d1ae6c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.xyz/app/406889139/coin-master-free-spins-link-download-free-game-hack PDF link annotation
    • http://christiansymbolkits.com/images/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/robux-win_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/robux-generator_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/links-to-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/download-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-minecraft-capes-no-mods_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://christiansymbolkits.com/images/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://christiansymbolkits.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046d2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46D2 25696 bytes
SHA-256: 0b79383f0de62d70b48ec692ae7c7cbd791c561a1d441f56b93d44ec93dd88d5
font_01_sfnt_off0000814d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x814D 18636 bytes
SHA-256: e0ee4d28e9fbd90893640acb023fdb3433a7d18e360fd79b0a1965f7934d0c46

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