Malicious PDF — malware analysis report

Static analysis result for SHA-256 91d10b1a46c180f9…

MALICIOUS

PDF

35.1 KB Created: 2021-07-07 05:15:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b441abc7d50f83e80cbb51ad61d1d7c4 SHA-1: 15d5bd8d983ead8088211409ebb135e3ecf9ba68 SHA-256: 91d10b1a46c180f9cec9c3b74ab21f0dfc18ae3538ae8d086c3b6a3051f5bbb0
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/how-to-hack-robux-on-ipad-game-hack PDF link annotation
    • http://samavetpharm.com/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-hack-roblox-s3x-admin-and-more_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/hacks-for-jailbreak-in-roblox_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-alt-account-roblox_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/how-to-get-to-village-3-in-coin-master_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-cards-generator-2021_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-site_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/roblox-promo-code-hack_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/no-robux_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/tiktok-free-promotion_GM835599320.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/hack-roblox-rose_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-admin-free-spins_GM406889139.pdfIn PDF document text
    • http://samavetpharm.com/userfiles/files/coin-master-hack-apk-no-fb-login_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
font_00_sfnt_off0000307f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307F 22656 bytes
SHA-256: 73af23308c8b4f05580ea6ac54ab0d7304305fdb5e257cd3b39d9d78f242e1ca
font_01_sfnt_off0000634f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x634F 19236 bytes
SHA-256: e24dafb54fdd477f29c8cbd630df3de1c75a274f2b728913b5397960a91e4d4d

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