Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2bc64f6028964ea…

MALICIOUS

PDF

43.0 KB Created: 2021-05-17 18:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 865825c0c91a295f5bf8b94fcad7c633 SHA-1: ef174628191c47f1ae13b53e96d6ceb0e989f65f SHA-256: c2bc64f6028964eac0fea33c8e57037510768cd7cfae6665c9a3f17fa5947267
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free robux'. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users with fake offers to click on these malicious links, which likely lead to further malware downloads or phishing attempts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-gift-card-online-free-game-hack In PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-email-free-spins_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/freerobux-hack-us_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/hack-download_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-tiradas-gratis_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/robux-com-free_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/free-robux-please_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/roblox-generator_GM431946152.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-free-gold-cards-link_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/coin-master-free-link-app_GM406889139.pdfIn PDF document text
    • https://nutrafeliz.cl/ckfinder/userfiles/files/minecraft-bedrock-edition-pc-free_GM479516143.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_off00004abf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4ABF 25416 bytes
SHA-256: 223b44eeeaf4f9b087292bcd7a3f81bfa6b3a1b28c8569c8f292c269a8fcc776
font_01_sfnt_off000084a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A3 18572 bytes
SHA-256: df9893eb1f0d0b90ef1012123e626362df07f41b7e954edba7018aa352f9b9fa

Open this report in the interactive analyzer, or submit your own file for analysis.