Malicious PDF — malware analysis report

Static analysis result for SHA-256 020849129e47eb56…

MALICIOUS

PDF

33.6 KB Created: 2021-06-27 16:14:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0f165b6295e1416abf78ab75fe0db9ac SHA-1: f66d914874ef3d1fddbb1b8d74fec3cb57149808 SHA-256: 020849129e47eb563624a53750730abf3eed54392f2d468aa1902194a04556b0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into downloading "game hacks" or "generators". The primary malicious link, http://netcdn.co/app/431946152/speed-hack-roblox-download-2021-game-hack, is identified as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially malicious download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/speed-hack-roblox-download-2021-game-hack In PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/wurst-18-9_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-character-cheat_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-prop-boat-free_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/get-free-roblox-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/pubg-uc-30_GM1330123889.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/roblox-robux-hack-no-survey-no-password-no-download_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/coin-master-hack-twitter_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id/repository/http-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/cute-free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://www.perpustakaan.unda.ac.id//repository/free-robux-generator-no-human-verification-2021_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_001_off00002a87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A87 22420 bytes
SHA-256: 6c0da6ceaad9381f2463f954ec5c81f73b6ef46aba9ea977de4d6be5ba44c29d
font_01_sfnt_off00005c49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C49 19740 bytes
SHA-256: adbfdd1d1b6a34dff5e33b6c9ad35df1e97f037b2d82bc21fc57a901efff7f96

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