Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf949c51cdc066c…

MALICIOUS

PDF

46.4 KB Created: 2021-05-11 22:30:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f5ac9dfbf786e30a5343b1db693d08f2 SHA-1: 3c201c1996ffd01b3f19a562e8661a475a96978e SHA-256: 3cf949c51cdc066c0b892469c74e3f11e1b8ab14a562c14f971117dc3d5f9cec
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to 'how-to-hack-any-roblox-account-game-hack', which is a common lure for phishing or malware distribution. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lure suggest the document is intended to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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-to-hack-any-roblox-account-game-hack PDF link annotation
    • https://www.gornjastubica.hr/files/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-free-spins-generator-no-verification_GM406889139.pdfIn PDF document text
    • http://gornjastubica.hr/files/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-roblox-shirt-templates-2021_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-robux-meme_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/roblox-g_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/robux-generator_GM431946152.pdfIn PDF document text
    • http://gornjastubica.hr/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/coin-master-free-items_GM406889139.pdfIn PDF document text
    • https://www.gornjastubica.hr/files/how-to-get-free-premium-roblox_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004873.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4873 25516 bytes
SHA-256: bd6af1cfd4e057762179bf964018fb62b38e30f42b99f8bbe181886e5b6dad39
font_01_sfnt_off000083e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E4 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off0000910b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x910B 18772 bytes
SHA-256: d5ac01ba848f85c7af00746e0b4ab9643e0d1d2f53353368de6e0e250a854553

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