Malicious PDF — malware analysis report

Static analysis result for SHA-256 65b0c9ac1d6bccfc…

MALICIOUS

PDF

35.5 KB Created: 2021-07-01 08:14:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d4af26610a494d114884bb91170ed6cf SHA-1: a2c1dee39ec1c25b4310d5a23b2118bd555e74b3 SHA-256: 65b0c9ac1d6bccfc9b20b46f91af83debd4ce6d013f29816d42e87e098cd06cc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs that are part of a lure for free game hacks or currency, such as 'free robux' or 'coin master hack'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' confirms this, indicating the document's primary purpose is to redirect users to potentially malicious sites. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of numerous suspicious URLs and the nature of the lure suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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/http-free-robux-cf-1-minute-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id//repository/robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-minecraft-alt-generator_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hack-programers_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-400-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/150-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/gamesofficenet-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacks-para-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-items-codes_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-hack-generator-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
font_00_sfnt_off00003184.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3184 22824 bytes
SHA-256: bc51db5b9c8574673d0be3479ef7c17d7f51820a591b0e69e2a989b7d62c52ed
font_01_sfnt_off000064e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E6 19416 bytes
SHA-256: 54256eb6ca2c27e62fc7e4765045a1d8b030b3160b02c887de94317fadb27f64

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