Malicious PDF — malware analysis report

Static analysis result for SHA-256 854a5d32c66dec94…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 02:45:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8198acc69bb5da0a996feb34f6a8f560 SHA-1: 40f9de03e0053942069af0943e22213edc675702 SHA-256: 854a5d32c66dec94bfd439fad75725468d930cf8d417da63b885e8c22eec45a6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, designed to lure users into clicking for free Robux or game hacks. The document body and heuristics indicate a phishing or scam attempt, likely leading to further malicious content or malware download. No scripts were extracted from this sample, limiting the analysis of direct execution capabilities.

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/easy-way-to-get-free-robux-game-hack In PDF document text
    • http://library.ft.upnvj.ac.id/repository/websites-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-hack-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-arsenal-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-how-to-get-rid-of-the-anti-cheat_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-free-vip-t-shirt_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/robloxcom-robluks-for-free_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/cracked-free-roblox-exploit_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/cheat-codes-for-dayz-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-money-roblox-cheat_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_off00002eee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EEE 22212 bytes
SHA-256: f4c84ac9ede736bedb5318d8eab86266389e11f0f4df2a5400f30b54674f315a
font_01_sfnt_off00006034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6034 19196 bytes
SHA-256: 64e8f018724e62164b0ada1d77f482f882d8547e2dcd2accc6d14ba4748306e9

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