Malicious PDF — malware analysis report

Static analysis result for SHA-256 f23de3b77f277ae7…

MALICIOUS

PDF

44.5 KB Created: 2021-06-08 12:17:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 138963c42db352673b97ad63f6e0d03e SHA-1: e7d0986af48e72ff4b065bfbff52ef4918c040e4 SHA-256: f23de3b77f277ae7fdd88b6deded4a2346282c87c62c81e87527d81ba397171a
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 0.9865

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.tw/app/431946152/murder-island-hack-roblox-script-game-hack PDF link annotation
    • http://shoruq.sch.ae/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/actual-free-robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/robux_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-free-daily-spins-2021_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-get-robux-fast_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/coin-master-cards-for-free_GM406889139.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/minecraft-items_GM479516143.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://shoruq.sch.ae/userfiles/files/roblox-free-robux-website_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_004_off0000515a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515A 24328 bytes
SHA-256: 3925e5c7208d56f25c0eb8bb5b3cf6323738db615781271714e8794e575fe17f
font_01_sfnt_off000088ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FF 19092 bytes
SHA-256: a42fb06d7edb00acf9b046cea0b23d52852cbc3ea3f9901ed50a30202e3cc169

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