Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe4eeb0caf5ccd8…

MALICIOUS

PDF

43.9 KB Created: 2021-06-03 22:46:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0fcd2fef7dd6b281d96e4575db4f5cc8 SHA-1: 1d96c193891c3a8a8aabd0c3e69a2add5dd7dc2c SHA-256: cfe4eeb0caf5ccd848638e6510a199b884e97499355ec811a1d4e4c59950eb93
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a website offering 'game hacks'. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate it's a lure for malicious redirector infrastructure. Although no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to trick users into visiting a potentially harmful site, likely for further malware delivery or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/minecraft-hacker-mask-game-hack In PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/tiktok-free-now_GM835599320.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-mod-apk-download_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/is-minecraft-education-edition-free_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • http://ebook.itn.ac.id/repository/robux-fun-hack_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
stream_004_off00005271.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5271 24788 bytes
SHA-256: 5d76a60aa84d0cee590421448097e0db0c45619312f94b8b1500296e2c5c74b6
font_01_sfnt_off00008ab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB0 17740 bytes
SHA-256: 0307ae1fdf286ae380d36e270ef5c992f348f7a5470d5d5ce449782a5f21d577

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