Malicious PDF — malware analysis report

Static analysis result for SHA-256 8146dacd6f8356f9…

MALICIOUS

PDF

43.6 KB Created: 2021-05-10 19:11:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 7d6b035e820f92a9a9ea8ebe4cfd6d96 SHA-1: b7a197dc5776f72b3ca7260f4d6be0c4097b6c15 SHA-256: 8146dacd6f8356f9c2ddcf63decf1afd88b81654bcf4487ccd77d43b62b56c39
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-confidence heuristic indicating it links to a 'game hack' redirector, specifically pointing to 'https://netcdn.xyz/app/406889139/coin-master-hack-download-2021-game-hack'. The document body also contains similar lures and numerous other URLs, suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, aligning with common social engineering tactics.

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/coin-master-hack-download-2021-game-hack PDF link annotation
    • https://www.donjastubica.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-hack-facebook_GM406889139.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/irobux-com-redeem_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-spin-and-coin-link-haktuts-hacking-news_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://www.donjastubica.hr/files/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://www.donjastubica.hr/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • http://www.donjastubica.hr/files/games-for-robux_GM431946152.pdfIn PDF document text
    • https://www.donjastubica.hr/files/free-robux-no-verification-2021_GM431946152.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_off00004cd9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CD9 25052 bytes
SHA-256: 16a4aa1d765df99abfbec2f7aa628eb7ca272a0693b6e61bbee7fe2524d5210e
font_01_sfnt_off00008689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8689 18696 bytes
SHA-256: 8be69e5611b2f1b9a2f3a77307bfff4bdbd54e1b1e6fe005490b405b0e560c9f

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