Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3ccf9629269582b…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 16:04:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: fa3b83931ab42acad145db73cc09568d SHA-1: 52020439bab0b1f23813cc7b2d2003bb1602c697 SHA-256: a3ccf9629269582b7d3b246438a724552cbd306e3e482e1e9c8b5d2316d45f0c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a 'game hack' or 'free currency' generator. The primary link redirects to known malicious infrastructure, indicating a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack aimed at redirecting users to potentially harmful websites.

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/406889139/coin-master-daily-gift-free-spins-and-coins-game-hack In PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/robux-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • https://www.jcn.co.uk/uploads/files/files/getrobux-come_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_off00005012.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5012 24632 bytes
SHA-256: b6c2c6ccbaeb5736eaee968b5eed924dbb19c0c46be91e9f1150d1cdce998c92
font_01_sfnt_off000088fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88FC 18480 bytes
SHA-256: 3ccd0e6e182247473c8fd8a661e1697f212027199d1cdaa086bf60c9e83bc44d

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