Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb6528f25fbb137e…

MALICIOUS

PDF

42.7 KB Created: 2021-05-10 16:07:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 93429fa782ee9a5c0eb9fec0eb54dc0d SHA-1: aa18ae6c1099ad04f89c120c68f17e7370a2d601 SHA-256: cb6528f25fbb137e7263cfac757d385ad0ff77d502d506bfd2448c0d1d506624
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple lures for game hacks and free currency, directing users to external URLs. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it links to a game hack redirector and an IP address literal. While no scripts were extracted, the document's content and linked URLs suggest it is designed to trick users into downloading further malicious content, likely through a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 6

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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/479516143/minecraft-free-download-android-game-hack PDF link annotation
    • http://36.94.36.7/elib/repository/free-robux-no-human-verification_GM431946152.pdfPDF link annotation
    • http://36.94.36.7/elib//repository/minecraft-java-edition-download-free_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/60-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/roblox-got-talent-piano-hack_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/how-to-get-free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://36.94.36.7/elib//repository/minecraft-online-free-download_GM479516143.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_off00004d5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D5F 24724 bytes
SHA-256: 843f120a7d4de59fa28df34e1c3e3ee2d640c43bed8a1184ef479a1a294a3e2c
font_01_sfnt_off000084bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BC 18292 bytes
SHA-256: 9d9b0ee832c8ed03a3e8d039feca9f5c484872876758be0788389d8bcd5131f0

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