Malicious PDF — malware analysis report

Static analysis result for SHA-256 f550053deac40ce4…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 04:48:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fd91d8cfb99dfa3ddd58fe86640380f2 SHA-1: 563da66fb32aed3a3acd14e650abfafc654bb125 SHA-256: f550053deac40ce4b2d777a33e0e220c8744fe523a811b50929504f6886107ec
102 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 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.co/app/431946152/how-to-get-robux-for-free-on-pc-gift-card-game-hack PDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfPDF link annotation
    • http://103.68.2.77/__statics/gudangsoal/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-hack_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-mba-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-free-robux-2021-promo-codes_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/is-tiktok-pro-free_GM835599320.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/roblox-hack-robux-download-apk_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://103.68.2.77/__statics/gudangsoal/files/free-robux-games-that-actually-work-2021_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
font_00_sfnt_off000031c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C1 22008 bytes
SHA-256: 3345f8462cf8efea76d62f4173abffe9c65cbf8426338a3597a7a42335e3819c
font_01_sfnt_off0000621f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621F 19432 bytes
SHA-256: ca0ab49d9cb0636c213af47de5f3a7907ff9f024e155af8b3babb5b19d7a8240

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