Malicious PDF — malware analysis report

Static analysis result for SHA-256 b43e1c972cc0e600…

MALICIOUS

PDF

35.4 KB Created: 2021-07-09 04:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c8b730840eebccad595505b5fb924296 SHA-1: 82a8fe514a9a1d592690dc25f52343c22d7735da SHA-256: b43e1c972cc0e6003aef2f1eef69b8358c164600b3456bb6ef7d42dc081e7e9e
82 Risk Score

Malware Insights

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

The PDF document contains a prominent link to a website promising game hacks and free in-game currency, a common lure for phishing or scam sites. The ML classifier strongly indicated maliciousness, and the PDF's structure and embedded URI point to a redirection to a potentially harmful external resource. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/where-can-i-get-free-coins-for-coin-master-game-hack PDF link annotation
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-net_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/roblox-script-hack-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-cards_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-roblox-in-game-hacks-download_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/where-can-i-get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/hack-for-texting-simulator-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • https://elearning.min1bangkalan.com/__statics/gudangsoal/files/boku-no-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.urcouponsdeal.com/2019/03/coin-master-free-spin-and-coin-links.htmlIn 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_002_off000033e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33E7 23056 bytes
SHA-256: 8248f56f047625b0e0b2b4f11ef9083003d6a794a05935274b37783995581a09
font_01_sfnt_off000067c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C8 18360 bytes
SHA-256: c8dfeb0eef3fc723180845c5cf074af1342c80af6259c5e1d52ca41750db4653

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