Malicious PDF — malware analysis report

Static analysis result for SHA-256 46aa6538920ef219…

MALICIOUS

PDF

42.0 KB Created: 2021-05-19 14:15:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e477c3fc1669db81265186e8558e73a0 SHA-1: 5a781b38b62358f4833ea475aeab2180015b1f0b SHA-256: 46aa6538920ef21967a90d421acf69fc142c58a1ab1c1b9b448394ba0008f9ef
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 0.9971

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/479516143/minecraft-cheats-pc-2021-game-hack PDF link annotation
    • https://edu.kyst.com.tw/image/data/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-spins-coin-master-march-2021_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/hack-coin-master-343-apk_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-free-bundles_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/minecraft-java-edition-free-code_GM479516143.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/real-robux_GM431946152.pdfIn PDF document text
    • https://edu.kyst.com.tw/image/data/files/roblox-hacks-2021_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_off00004a59.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A59 24912 bytes
SHA-256: 071bdc7bd472af7ac7a1cf570d4de74ead9c9e1d559c41836c03e32e17e9ecc7
font_01_sfnt_off000081ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81EF 18292 bytes
SHA-256: 2d037195ba652ec1c948f4cf72bc757aedb522eec45588ee568a5b79e45c6912

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