Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e546a3d7221e58c…

MALICIOUS

PDF

45.8 KB Created: 2021-05-12 02:07:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5b67b811e72fddeed9dcbf7470300a5b SHA-1: ab66795de5f5612cb0b7cda77bd7f5a78f34cb40 SHA-256: 4e546a3d7221e58ca92017628abda36849f6a9968eb4501cd27a149dc539ccdf
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 0.9432

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/how-you-get-robux-game-hack PDF link annotation
    • http://leigraphics.com/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/free-flip-master-coins_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/free-minecraft-com_GM479516143.pdfIn PDF document text
    • http://leigraphics.com/images/hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/master-free-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://leigraphics.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/robux-free-com_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/coin-master-free_GM406889139.pdfIn PDF document text
    • http://leigraphics.com/images/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://leigraphics.com/images/cool-free-minecraft-skins_GM479516143.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
stream_003_off00004840.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4840 25632 bytes
SHA-256: 6382429a493991c540ddc253a7c320662467a88593f66ce421eae3acadc07a96
font_01_sfnt_off00008395.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8395 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000903d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x903D 18280 bytes
SHA-256: da9d84f1cd45b5ac6ec9aefdd652d6bdce11e542494ae2da0581909ee8565979

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