Malicious PDF — malware analysis report

Static analysis result for SHA-256 e774e4f23e8917a8…

MALICIOUS

PDF

35.8 KB Created: 2021-05-22 10:41:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e900cea5e623d8a14f7f8e7fef2918b4 SHA-1: 927e9610ecc61743528e7727813542db1a8a15d4 SHA-256: e774e4f23e8917a8ac75aeb3720c09f8a7047285f08f51718a8a3baaeca3117e
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 0.9492

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/479516143/was-minecraft-ever-free-game-hack PDF link annotation
    • https://www.dc-itsolutions.com/userfiles/files/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/roblox-skin-free_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • https://www.dc-itsolutions.com/userfiles/files/coin-master-game-hunters-club_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_002_off0000326f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x326F 26164 bytes
SHA-256: 37358285732728f61129d17a98cf2860d19a8224de76ccce7101328a8bf934f8
font_01_sfnt_off00006bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF9 17880 bytes
SHA-256: fa9564ce5793f03604dae66ea4261aaef87f9e1e7420b634dd5196a1b51aa919

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