Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c04dad45382825…

MALICIOUS

PDF

46.3 KB Created: 2021-05-19 16:37:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 721a33f95a730eb18958857236321a79 SHA-1: 22506fe3528acdb982f8d7b97f8df4091ea82081 SHA-256: 05c04dad45382825c37918fffae183e0e2a29eeac3bc6587f621eaa02251a75a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.8696

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-today-hack-game-hack PDF link annotation
    • http://kancelaria-legnica.eu/images/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/free-robux-youtube_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/coin-master-free-coins-and-spins-online-tool_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/free-800-robux_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/roblox-rape_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/roblox-generator_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/how-to-play-coin-master_GM406889139.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://kancelaria-legnica.eu/images/pokemon-go-free-7km-eggs-august-2021_GM1094591345.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48A5 26476 bytes
SHA-256: ba3f6fd01a58d7b22a06e2e8fe700cf2039f2d2d162bfbda9d023f0e59d64f45
font_01_sfnt_off00008567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8567 3620 bytes
SHA-256: d859fd77b85f3b3415639a87e8809ecf698e2c52ea4a2633c07d9e96259cae8a
font_02_sfnt_off0000922a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x922A 18412 bytes
SHA-256: 78e241cf2016df2e6ebc2ce00be22676d65e6ec45cce47e077571dd8c0cc4425

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