Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42c9de08182a395…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 11:54:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a8857a63ad0386538f22867569704905 SHA-1: dd993b4fe38a72a8db4535c230c74913e410600e SHA-256: e42c9de08182a395c299441d025408b5fd33b3b9bbe9fea7f3fd55dad4de6358
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links and a call-to-action phrase, luring the user to click on a URL that promises game hacks. The ML classifier strongly indicates maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the content. The primary IOC is the redirector URL, which likely leads to a malicious site or payload download.

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/fun-games-to-hack-on-roblox-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/vermillion-robux-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/google-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-august-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-mad-paintball-2-hacks_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-et-free-robux-in-a-roblo-game_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hacks-para-todos-los-juegos-de-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-spins-on-coin-master-2021-ios_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-the-galaxy-hair-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-hair-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/pokemon-go-free-ticket_GM1094591345.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-adidas-hoodie-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/best-free-exploits-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/tiktok-free-followers-generator_GM835599320.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/como-ser-hacker-en-roblox-jailbreak-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_off0000324f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324F 22088 bytes
SHA-256: 1a2fcfb1dc7e52bbd80f09fccdef97110bbe4ef60f5055b53a63c442f1a5dcc8
font_01_sfnt_off0000633d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x633D 19220 bytes
SHA-256: af4cebe96f38fe670c7bd8ddc1f6eff2959cedcdb21c538240819fef059ec3d4

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