Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d7718b9f7b0a1f…

MALICIOUS

PDF

36.2 KB Created: 2021-06-26 22:07:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e1ca36bc34003a9748608b5ceceae098 SHA-1: 2caef6c6fd6deb0a569d9350dc16ea6904cb9054 SHA-256: c2d7718b9f7b0a1fde4abdcea2710be03eee7080114a912e1dc203eeb1c9f434
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/what-cheats-can-you-do-to-get-robux-fast-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/free-spins-on-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-full-game-free-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/redboy-roblox-hack-easy-downlaod_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/im-hacking-roblox_GM431946152.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/coin-master-free-spins-link-fb_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-in-robloc-for-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-card-code-generator-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-websites-that-work_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.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_off0000350a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x350A 22436 bytes
SHA-256: 70736c302c313f2ae4f578b3fd1883c47c2fc7e451149128c09c025e80820dd3
font_01_sfnt_off0000670e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670E 19512 bytes
SHA-256: 046663cae73474540bd7440a1f6248f975656bd8ce1caa3d75c1ea4125f3a7ac

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