Malicious PDF — malware analysis report

Static analysis result for SHA-256 c60a79a82b73126d…

MALICIOUS

PDF

41.6 KB Created: 2021-05-23 11:10:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f5584ef30646afb6e271739a29c78ba9 SHA-1: 6b0a5ea3752786a0dc783c405c4c8d07dadc9570 SHA-256: c60a79a82b73126dc2376dadd0150eb9a493e4b57738749ba53606c9cba982f8
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 0.7466

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-game-hack PDF link annotation
    • http://www.rezbb.sk/images/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://www.rezbb.sk/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://www.rezbb.sk/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://www.rezbb.sk/images/free-robux-earn_GM431946152.pdfIn PDF document text
    • http://www.rezbb.sk/images/pokemon-go-free-or-shadow-mewtwo_GM1094591345.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_off00003372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3372 26608 bytes
SHA-256: 80198a20d0a91ed2afcf7f63830b444373a6926636f7c189dbab6571fe7037a7
font_01_sfnt_off0000711a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x711A 6856 bytes
SHA-256: c569170cc3d1848c0c311e7179e843d24a5385ebd65a21c7531e8e69755d5403
font_02_sfnt_off000081df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81DF 18088 bytes
SHA-256: 03c92d59c548fbfdae08874221752d30f8caaed88781636bf7d18542e7c5fe52

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