Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada2a47e87b4876d…

MALICIOUS

PDF

43.6 KB Created: 2021-05-13 13:48:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e084c8a7c0b57ea01c09556567313309 SHA-1: 114dcdaaa7bb9e3193376305a66033d99c9068fd SHA-256: ada2a47e87b4876dc529a72b412346cc5834066b931e0672522d765144c65787
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains numerous links to external websites, many of which are designed as link farms for game hacks and generators. The primary URL, 'https://netcdn.xyz/app/479516143/bad-minecraft-free-game-hack', suggests a lure for malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of similar links, reinforcing the malicious intent of directing users to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/479516143/bad-minecraft-free-game-hack PDF link annotation
    • https://esl.hess.com.tw/image/data/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-executors-for-roblox_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-mod-version-free-download-34-4_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/robux-codes-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-get-free-roblox-items_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/minecraft-pe-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/como-hackear-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-get-free-robux-website_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_off00004a4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4C 30816 bytes
SHA-256: 922f8f6bce57afb260869e0e354738e2ac92db7e5ef69de860ec59ded76fab69
font_01_sfnt_off00008971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8971 17956 bytes
SHA-256: 384105d45f3b455646b6eb64dcdb09349e5e1756e4baf8ede6c7c1462ef2dc47

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