Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25fec58837ae85b…

MALICIOUS

PDF

46.3 KB Created: 2021-06-08 12:44:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d0f6fa8d8371e9bb2d3da4e4f07dfe81 SHA-1: d5be926e61718f72fe802822728b8df1c98b10ad SHA-256: d25fec58837ae85b26fac7f66fe0ac35202c59ae9ea29a6da56698d1d0d38b35
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks, directing users to a malicious URL. The ML classifier strongly indicated maliciousness, and the PDF structure includes external URIs and embedded URLs consistent with a phishing or redirection scheme. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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 https://netcdn.tw/app/431946152/counter-blox-roblox-hack-2021-game-hack PDF link annotation
    • http://library.unissula.ac.id/fe/repository/roblox-top_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-apk-33-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-free-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/optifine-pe_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/abd-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-coin-master-s_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/pokemon-go-free-gifts_GM1094591345.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/coin-master-hack-pro-gamers-com_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FC2 23780 bytes
SHA-256: 4870b18b7a7ba689b4eac489ef0aba0e019ee3bb307bbd8e0f6e80881d17a6e5
font_01_sfnt_off0000860b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860B 2984 bytes
SHA-256: 2df87bbe4e27b27e34c872c092d0522acd977d05f5cbde7ed5e1fdfeb59cb318
font_02_sfnt_off00009059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9059 18828 bytes
SHA-256: dc9ef23c03bfaa292bfbeed61fefba3942b1d9db82030e166943f380719ea4cb

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