Malicious PDF — malware analysis report

Static analysis result for SHA-256 fafbd3cb1ae6b680…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 05:02:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0a9620bbed1172a38eb28a64d59fbbee SHA-1: 827a56b658c97a327165d53ee036382b4f704e20 SHA-256: fafbd3cb1ae6b680047ca9f1f76c0fb08ce248ac10f591531376e5aca97f9b07
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 a malicious redirector. The primary lure, 'Earn Robux Now', points to a URL associated with known malicious infrastructure. The document body and heuristics indicate a scam related to free in-game currency or hacks, likely leading to further malware download or phishing.

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/431946152/earn-robux-now-game-hack In PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/5-real-roblox-games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-get-free-10-000-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/hacks-roblox-scripts_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/heroes-online-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/island-life-hack-script-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-how-to-get-free-robloxian-20_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-dragons-life-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-hack-video_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-ninja-legends-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-roblox-on-chrome_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/obby-gives-you-free-robux-no-password-required-2021-link_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/cheat-codes-for-roblox-candy-war-tycoon_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/robux-scam_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_off00002ea5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA5 22396 bytes
SHA-256: 3b70b4ae184d85dd4a15d394426523b00d92171f13dc4196cde33352e0656b48
font_01_sfnt_off00006081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6081 18716 bytes
SHA-256: ad9d788a26765a58da61a35e1cf8ac4777a7c6bf95241a2670242caf96161301

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