Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4f12d3ad09e437…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 06:14:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 12c9319a624b8453e7230c5814879601 SHA-1: 8990b494333418280b75522ea6a092aca16c05dd SHA-256: 7b4f12d3ad09e43756a921a3c8c65a25d1e932f25bcca64ed57aec6b568d71ea
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms for game hacks and cheats. The primary lure appears to be a "hack" for Coin Master, directing users to a download URL. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest a malicious intent to redirect users to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/download-hack-coin-master-apk-game-hack PDF link annotation
    • http://wadimor.co.id/media/imagesfiles/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/best-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/app-master_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/how-to-get-free-hair-on-roblox_GM431946152.pdfIn PDF document text
    • http://wadimor.co.id/media/imagesfiles/coin-master-hack-apk_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_off00004ae2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE2 25476 bytes
SHA-256: a880239fe2f2fb04af02820b756cb43cb0225537363aa5e634babd25e7903931
font_01_sfnt_off000083f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83F5 18472 bytes
SHA-256: 48f2fb6a54f4a1d4da48af3cad9101beb926a58239587b90eb535e02f3a3ea4e

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