Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b5de9396e896318…

MALICIOUS

PDF

34.3 KB Created: 2021-06-29 21:19:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 70b830e2617f4ffb25745a5c5393a0ab SHA-1: 310f013bbd27faefce562d0db3fdefb6d03af86c SHA-256: 1b5de9396e8963187442aa87f5010e4469ec9ba9e169517efb301ee58d422395
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF slugs, suggesting a link farm designed to attract users searching for game hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a download button lure and callback lure further supports a phishing or scam attempt. The document's content and embedded URLs point towards a social engineering tactic to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/como-hackear-dragon-ball-fury-roblox-game-hack PDF link annotation
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-spins-and-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/whats-robux_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-get-free-spins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/brdarski-roblox-inspect-element-hack_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/easy-robux-today-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/tiktok-free-download-windows-7_GM835599320.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/kachifpro_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-hack-in-roblox-pc_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/get-clothes-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.highlandernepal.com/assets/ckfinder/userfiles/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F93 21808 bytes
SHA-256: ac26385b140fb57061203c10aca13e99a5348d2be505b6365d4386eb67dbbc1f
font_01_sfnt_off00005fa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA5 19568 bytes
SHA-256: 7df1c3089ed8236d7a755ce763d64f7b8ec6e64008ad90ec964ff48befb6ef9e

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