Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f553939af50f5ab…

MALICIOUS

PDF

45.2 KB Created: 2021-05-13 10:01:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5b070ad0832e82983a77b247d3e1a59c SHA-1: 8b62d2865e6f656f826bc804135c14d16baebd9e SHA-256: 6f553939af50f5abd6f10183cd9ab1946f6908b7d134ef4f68b9865945e6e67b
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 0.9621

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/431946152/robux-free-c-game-hack PDF link annotation
    • http://properteez.com/images/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/202100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://properteez.com/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/how-to-get-real-robux_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/free-spins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/how-to-get-roebucks_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://properteez.com/images/google-moon-active_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://properteez.com/images/robux-free-robux_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://properteez.com/images/how-can-you-get-free-robux_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004589.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4589 25960 bytes
SHA-256: c160e410466c8c429825717ae424e0a75f3d28f49ec318d320305f6491e55fc2
font_01_sfnt_off0000811f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811F 4192 bytes
SHA-256: e17e28f7a7725f9193ccbbc12b50a8941fe60e8e51b1ffc98d0a635c2cd2fba6
font_02_sfnt_off00008ed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED7 18012 bytes
SHA-256: 3f1ded8a9c51e4f0f41c660fd84d3573ebe8f92a83837bcaa523a9614d650e73

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