Malicious PDF — malware analysis report

Static analysis result for SHA-256 654a8e62b24ac39c…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 16:14:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 77f5d25caea0383cfa0a5f182239ee22 SHA-1: 690ed9bbd6c67cf1e776868c98f4065ab204f9e2 SHA-256: 654a8e62b24ac39c3c4ff11a3746c6296b166c72a5b3c26f103771884f11af48
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting 'game hacks' and 'generators' to lure users. The primary redirect URL is https://netcdn.xyz/app/431946152/games-for-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection-based attack designed to lead users to potentially malicious content or further downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/games-for-robux-game-hack In PDF document text
    • http://skwolcott.com/images/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/play-minecraft-online-free_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-spins-coin-master-april-2021_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-appsfor-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/is-coin-master-free_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdfIn PDF document text
    • http://skwolcott.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://skwolcott.com/images/get-me-robux-for-free_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
font_00_sfnt_off00004811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4811 27192 bytes
SHA-256: d3fa73d63f55c02ac4f4829eb7a332433e15410562d4af89b136e65aa412fcdf
font_01_sfnt_off00008542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8542 18500 bytes
SHA-256: ad01f7040899aac4b12b67a2e6a3a9146063970ead780f552734f1276374e517

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