Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d094f96bcae28e3…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 04:55:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: b3e82f772a4549eb6b8d163804e806da SHA-1: 623cfa30dc812369166dfb75483026d0505405bc SHA-256: 0d094f96bcae28e335061a4f8a7f574b9c6b0cf17ae244a0102d40279aa820c6
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generator / game hack' lures. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/free-spin-link-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-a-free-boombox-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-any-items-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-mad-paintball-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-mad-city-xp-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/rblx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/wurst-minecraft_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-com-accounts_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-password-hacker-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/top-free-rthro-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-catalog-robloxcom_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-free-spin-sites_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-dominus-hat_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_002_off00003018.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3018 23220 bytes
SHA-256: 1d6e62198453ad862f55cefa664015df747902271c237ed40e9d71297ff9090f
font_01_sfnt_off0000644b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644B 18096 bytes
SHA-256: a2e26d43a170bbc72ff377da92d823caf5fd34af2d54d5e58167bc484aeb8b2c

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