Malicious PDF — malware analysis report

Static analysis result for SHA-256 be2fc95b873c6c50…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 10:04:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4c49cf163590588168ecbec5f19547db SHA-1: 892b8d142458a64333ba1e91841be3601ea08ef9 SHA-256: be2fc95b873c6c501d44cd67f82f218ffcdcf4259fc526ee91eaa2354c91b795
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and cheats, identified as malicious redirectors. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded URLs and the nature of the lures strongly suggest a phishing or malware distribution attempt, likely initiated via a spearphishing attachment.

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.tw/app/479516143/windows-10-minecraft-hacks-game-hack In PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/roblox-jailbreak-noclip-hack-feb-2021_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/coin-master-latest-version-hack_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-robux-gift-cards-2021_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/coin-master-game-free-spin-download_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/how-to-get-free-robux-fast-hack_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/coin-master-hack-tool-no-survey_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/tiktok-free-watermark_GM835599320.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/roblox-get-all-gamepasses-free_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/april-2021-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://juscor.com.br/ckfinder/userfiles/files/free-hair-on-roblox-2021_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_off00002e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7C 22572 bytes
SHA-256: 3fdfe84126bfbc4e06e3cba55dd525cb6dc070ce47480f730e8f8a5a4cba8e15
font_01_sfnt_off000060b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B1 18980 bytes
SHA-256: 03214c18f960a48cbd31d6f5bef257b62caa9c5e4674619e4c22a7c51e90e08f

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