Malicious PDF — malware analysis report

Static analysis result for SHA-256 81262efc3a125bd7…

MALICIOUS

PDF

42.5 KB Created: 2021-05-11 16:40:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 64428720bf559d76efe7a35d4a04b7e5 SHA-1: ecdec957dbe0a182bd3dd525531ec9c3dbc18684 SHA-256: 81262efc3a125bd7630ad5206553da63f34281243ef52ec0d98737e77a064e1d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file 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 0.9971

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.xyz/app/406889139/coin-master-free-online-game-game-hack PDF link annotation
    • http://techmobil.pl/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-raid-link_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/rbx-hut_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-hack-without-verify_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-coins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://techmobil.pl/images/a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://techmobil.pl/images/free-spins-and-coins-coin-master-2021-link_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
stream_003_off00004ace.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ACE 24964 bytes
SHA-256: 3087d2d18b26bc8e8b5d5b7ecdf6f4ece98331a3a9436f0c00d653e3d3525928
font_01_sfnt_off000084b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84B2 18044 bytes
SHA-256: f55611517853c9a75744f85dcee2126c23b046b59fba7ee14d63f8cfd243840d