Malicious PDF — malware analysis report

Static analysis result for SHA-256 df6c5224e82eeae2…

MALICIOUS

PDF

42.4 KB Created: 2021-05-13 23:49:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ece1184f69bc0860d4da2fede45ef5d1 SHA-1: 638c85ca0b7959bc140221b7eea71fa11921224e SHA-256: df6c5224e82eeae211d2a4c2eeeab076ceab70b8ca8fe1db6b457c46db07534b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting "game hacks" and "free generators" for popular games. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it's designed as a lure to redirect users to potentially harmful content. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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/406889139/coinmaster-free-cards-game-hack In PDF document text
    • https://newenglandafs.com/images/ww-robux_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/earn-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/rbxdemon_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://newenglandafs.com/images/ro-ghoul-script_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/fast-robux-online_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-coin-master-app_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • https://newenglandafs.com/images/how-to-hack-roblox-accounts_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_off00004abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABE 25112 bytes
SHA-256: 73519f093cb91b1f7cea146b59d3508e940f41b7a93f761d9fd9c975e24ec56f
font_01_sfnt_off000083e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 18144 bytes
SHA-256: 4e9ac2dffccf12dc152d767ce3e4837f7e1c2082475e153b18622bd7e6b7030e

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