Malicious PDF — malware analysis report

Static analysis result for SHA-256 3558a5822d87210d…

MALICIOUS

PDF

43.5 KB Created: 2021-05-19 21:24:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d092acfc393bc94d55d1c009f0f54f42 SHA-1: 14ef738322158a0f84ff7156c9e37f34a273e0a5 SHA-256: 3558a5822d87210db42fcfb63aa4d4377cb055045eb088df59353958c6f87f7c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document employs a common lure of 'free game hacks' to trick users into clicking malicious links. The presence of a fake CAPTCHA or human verification prompt is a strong indicator of malicious intent, designed to coerce users into executing further actions. The document contains multiple embedded URLs, including one pointing to a known malicious redirector, suggesting it's part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/cute-free-hair-on-roblox-game-hack PDF link annotation
    • https://cluster-consulting.com/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/how-to-duplicate-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/easy-robux-today_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/free-robux-safe_GM431946152.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/coin-master-hack-here_GM406889139.pdfIn PDF document text
    • https://cluster-consulting.com/images/roblox-mobile-hack_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_003_off00004a50.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A50 26676 bytes
SHA-256: 21267eec61770339a597497e1b1e8eef03e8602f6163247fe6e43d8b1c979d26
font_01_sfnt_off0000870d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x870D 18540 bytes
SHA-256: 488c37b81cb6318595a8d643f53454b31d34364b68f61b3c1daecc568804ddf5

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