Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5956f6f0ff49621…

MALICIOUS

PDF

42.1 KB Created: 2021-05-13 05:00:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f89b14e458cd74b2396913dd52ce7b82 SHA-1: ba028b87c2eabbfae875ff016fb90171890eda1a SHA-256: b5956f6f0ff496218ddf96ab0e7543a1ba5bcb766e458da6dadb7872bba8dfff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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/406889139/free-spins-coin-master-android-game-hack PDF link annotation
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/real-robux-codes_GM431946152.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/how-to-hack-coin-master-android_GM406889139.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/free-robux-master_GM431946152.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/roblox-com-games-referrer-roblox-player_GM431946152.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/minecraft-windows-10-hacked-client_GM479516143.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/minecraft-free-no-download_GM479516143.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://xn----7sbabhw4a8b0addm1c.xn--p1ai/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b4b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B4B 24256 bytes
SHA-256: 20e467c85f916e5d3728808b6d02f3de0700c4f00dd93fe23b96b42cc7dea456
font_01_sfnt_off0000830f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830F 18060 bytes
SHA-256: bb87bb437521cd022de534ae7fd6b6624f0fed030f820aba0cb18b6212db1e0f

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