Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f6f9094548ac1e1…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 09:06:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3b7ee667403f856d0b22d92d5196ee40 SHA-1: 166ad8b94f979b213acf21906256926370f1f739 SHA-256: 3f6f9094548ac1e1b7c5ef619f683a779199b60f825079711f497909c272e6a3
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 0.9980

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 http://netcdn.tw/app/431946152/robux-prices-game-hack PDF link annotation
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-and-premuim_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/avatar-roblox-game_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-tiktok-followers-app_GM835599320.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-free-dominus-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/all-the-hacking-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-promo-codes-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/robux-hack-sin-descargar-nada_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/watch-ads-for-robux_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/roblox-free-summer-codes_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-codes-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/is-pokemon-go-free-to-download_GM1094591345.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://hosoffices.com/ckfinder/userfiles/files/robux-hacks-for-pc_GM431946152.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
font_00_sfnt_off00002ed8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED8 22348 bytes
SHA-256: 10ceb3ccaa73adb80de90505602d1c40ef9b3740a4ea16200a36ea368b69112f
font_01_sfnt_off00006066.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6066 18824 bytes
SHA-256: 917b2b595c85e899e08b6a40e7434d48f59ea0235caebc632e03070b6eb7ba4e

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