Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e9e693d223fa48e…

MALICIOUS

PDF

35.1 KB Created: 2021-06-26 21:17:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a0a8fba4dbf0b147da16d1664ef089c0 SHA-1: 3007f5a600d27268f703cf62fbaf432f3be033be SHA-256: 4e9e693d223fa48ee62e61bc48044867ba3fd75f7d5568f5b2ba71ce958cd74e
160 Risk Score

Malware Insights

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

This PDF document employs a common lure of free game currency and accounts to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, likely serving as a gateway to further malicious content or exploits. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-roblox-accounts-with-builders-club-2021-game-hack In PDF document text
    • http://kukuck.de/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/how-to-hack-unercorn6-in-roblox_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/hacks-roblox-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/high-vis-roblox-free_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-hack-roblox-lumber-tycoon-2-new-hack-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-cool-hair-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-roblox-promo-codes_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-make-roblox-ads-for-free_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-get-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://kukuck.de/images/roblox-jailbreak-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-do-you-get-a-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/how-to-become-a-hacker-in-roblox-ios_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/h-free-robux_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://kukuck.de/images/tiktok-free-robux-hack_GM835599320.pdfIn PDF document text
    • http://kukuck.de/images/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://kukuck.de/images/free-robux-promo-codes_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
font_00_sfnt_off00003047.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3047 22088 bytes
SHA-256: f5a27ce56b2d8d0a22e50d77b57e5545a559bd65491f406794e44b33f2be029f
font_01_sfnt_off00006150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6150 19952 bytes
SHA-256: 1ec52cb5cb603b91ec58cb42dc5d900f0572e40ee6ba772ccd89be20f63f7d89

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