Malicious PDF — malware analysis report

Static analysis result for SHA-256 eef5f1987bffb65a…

MALICIOUS

PDF

33.7 KB Created: 2021-07-06 00:26:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 0047674cc37bd152b2c4755e02da8861 SHA-1: c864a9ad1dcfd00c37983c853da9195ebf43d207 SHA-256: eef5f1987bffb65aa2bf947a1278223b9a78a1d70e1c75e48d91dd1ad46835f7
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to sites offering game hacks and free currency, such as 'http://netcdn.tw/app/406889139/get-more-free-spins-on-coin-master-game-hack'. Heuristics indicate these links point to malicious redirector infrastructure, and the document body itself contains similar lures. The primary attack pattern observed is a phishing lure designed to trick users into visiting malicious sites, likely for credential harvesting or further malware delivery.

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/406889139/get-more-free-spins-on-coin-master-game-hack In PDF document text
    • http://perpustakaan.urindo.ac.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/which-cheat-engine-address-is-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-roblox-money_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/robux-app_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/roblox-hack-revealed-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/coinmaster-com_GM406889139.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/dragon-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/how-to-hack-roblox-assassin-on-ipad_GM431946152.pdfIn PDF document text
    • https://perpustakaan.urindo.ac.id/repository/como-ser-pro-20-en-roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://perpustakaan.urindo.ac.id/repository/android-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E20 22804 bytes
SHA-256: 5f93569e118def74d4d90f027ee1cc0646ea51d770955bb1c0550ca6d0252f77
font_01_sfnt_off0000611c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611C 18176 bytes
SHA-256: 4fd6d1aceac6cebacd30cf875f8d613d9461a91834818942a997ff440641441e

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