Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e953a564c2e74fe…

MALICIOUS

PDF

34.9 KB Created: 2021-06-28 04:08:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 40233c60ea4c0218c5bfedb1bade2014 SHA-1: 02d8777d070ee8a9fa8fbae8ff53c6745889bafe SHA-256: 5e953a564c2e74fe2f6d3f4ebd5c5aa65274524ab3423e2a667e05188d7c27d2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that lead to a malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.co/app/431946152/robux-com-free-account-game-hack. This indicates a phishing or scam attempt designed to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded URLs and heuristic firings strongly suggest a malicious intent.

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.co/app/431946152/robux-com-free-account-game-hack In PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-skywars-hack-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-anything-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-robux-hack-generator-how-to-get-free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/robuxhub-net_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spin-app-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-imagine_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-you-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spin-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-earn-free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-noclip-in-roblox-without-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-skip-animation-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-free-followers_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/views-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/john-doe-roblox-hacker_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_off000030e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E4 22736 bytes
SHA-256: dcc0e70c83178a025f61abc661669f0f761cbe71082a2a1aa5de5aae78bbd89d
font_01_sfnt_off00006368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 19080 bytes
SHA-256: 32d9e6b03a554a1d1b05830ab2b711b61feb6b5632c0af333621f1702401f479

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