Malicious PDF — malware analysis report

Static analysis result for SHA-256 d796153c15bdc2db…

MALICIOUS

PDF

37.6 KB Created: 2021-05-21 06:50:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9fbd370d95d84615fb4414da82dcb139 SHA-1: 1966cabbbeefa8d4619888737f551ce38bf573c2 SHA-256: d796153c15bdc2dbab68df3079d2e474ce644b7834d90ced1deb719ade657ed7
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 0.9447

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/431946152/roblox-free-robux-generator-game-hack PDF link annotation
    • http://ldjahorina.com/images/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://ldjahorina.com/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://ldjahorina.com/images/2021-roblox_GM431946152.pdfIn PDF document text
    • http://ldjahorina.com/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://ldjahorina.com/images/codes-to-get-free-robux_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
stream_002_off00003193.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3193 27560 bytes
SHA-256: 8dcf6fc8dca4356ada053fac6b8963b50893cc501006730ce0698bdb4122db80
font_01_sfnt_off00007125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7125 18420 bytes
SHA-256: 9bedda8babb487e8554fc45ae48be92d4657fab6cfffaa18de719644ed37071c

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