Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a22be9768d2dbc8…

MALICIOUS

PDF

43.2 KB Created: 2021-05-15 00:33:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 95cc85f7ce40ca48937f15143f104676 SHA-1: c45af5c456e1015cacf986e5cb9b80b041b178c4 SHA-256: 9a22be9768d2dbc844e3b3ea9bb8ff6a2a16c1b2a4aa57cfa764f0eaf4854edd
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are structured as PDF files promising game hacks and free currency. The primary link, 'https://netcdn.xyz/app/431946152/how-to-buy-robux-for-free-game-hack', and the associated PDF links suggest a lure to potentially malicious content or phishing sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.xyz/app/431946152/how-to-buy-robux-for-free-game-hack PDF link annotation
    • http://www.hlad.hr/files/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/hack-coin-pro-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/wurst_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://www.hlad.hr/files/robux-fun-hack_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-thumbnail_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.hlad.hr/files/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://www.hlad.hr/files/codes-to-get-free-robux_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_off00004806.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4806 27756 bytes
SHA-256: 15295311a75b0e2b43db6c1b41e3fef5a5e20e162020393448c57f0107667c47
font_01_sfnt_off0000862d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862D 18356 bytes
SHA-256: 42cf6025b0828d48dcef6abba26d08473f6f67d2383591dd07323470bab2f866

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