Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ccb6d1c17692b3…

MALICIOUS

PDF

43.6 KB Created: 2021-05-10 19:16:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0f6d19d12ded12f6dce3c45844cf743c SHA-1: e856bb38301658321e9ac87d38f116ad14b14e75 SHA-256: 05ccb6d1c17692b3c1e522d84e63d623362e85b65a5e78fb95445648634b8c2c
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 0.9969

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/free-coin-and-spin-for-coin-master-game-hack PDF link annotation
    • https://www.cow-style.com.tw/upload/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/robux-claimer_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-avatar-com_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.cow-style.com.tw/upload/files/free-robux-mobile_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
stream_003_off00004b4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4C 26636 bytes
SHA-256: a4e5d344bd2eddb4a666dc5044dd5156a51fdb50fe2e825357aca6eb4ad203db
font_01_sfnt_off000088f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F8 18060 bytes
SHA-256: 42d2e7759bfcfecd447a46542d8809f4e944f7c9df23d0847fbb4c7837fae2b0

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