Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd237717b8e053b1…

MALICIOUS

PDF

37.8 KB Created: 2021-05-20 23:37:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 52110a12cf28bddbab11919f348e58d0 SHA-1: 344248a385ef89b26263adfe4964f272af7e9fe6 SHA-256: bd237717b8e053b1d6ae468beada1022105384c04962a3d34dd5d75d968d945c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a high-severity heuristic firing for a 'free generator / game hack' lure. The document body, though partially corrupted, contains references to 'Free Robux 2021' and a URL that aligns with the heuristic. The presence of these elements strongly suggests a phishing or scam attempt designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/free-robux-2021-game-hack PDF link annotation
    • https://estalagemmonteverde.com.br/images/grabpoints-robux_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • https://estalagemmonteverde.com.br/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003275.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3275 27900 bytes
SHA-256: 1f037b7d89a6718de0eafbf7237e30fe259a22671611e67ea1f15f4d57f3a7c0
font_01_sfnt_off0000723b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x723B 18416 bytes
SHA-256: a2c808792aaeb1607b9c3a91ae122c662faffffe8d42f3cf4118be6ccc5b3e7b

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