Malicious PDF — malware analysis report

Static analysis result for SHA-256 d56466375f1211cd…

MALICIOUS

PDF

45.6 KB Created: 2021-06-10 19:22:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 82116cd6e9660b5777d5bdfe5812e1a8 SHA-1: a04210e2ca00689690e796ed642a9f33c26c7877 SHA-256: d56466375f1211cd6515bda15df1a187f6485dde8181c47cc058ec400a088ea3
122 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a malicious link farm and callback phishing lure. It contains numerous external links, many of which are structured as SEO-optimized PDF slugs, directing users to pages offering game hacks and cheats. The presence of a "callback phishing phone lure" heuristic further suggests an intent to deceive users into contacting fraudulent support or billing services. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of harmful intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/fly-hacks-roblox-game-hack
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hacks-to-get-spins_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-get-robux-on-phone_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-make-my-own-coin-master-cards-hack_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/minecraft-mods-download-free_GM479516143.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-hack-free-spins_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-hack-game_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/blox-supply-free-robux_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-generator_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-robux-no-verification-at-all_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/free-tiktok-followers-without-human-verification_GM835599320.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/bit-ly-coin-master-hack_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-hack_GM406889139.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-free-robux-no-verification_GM431946152.pdf
    • http://balibetonmandiri.com/new/public/ckfinder/userfiles/files/roblox-free-robux-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005474.bin
5f2cf55a0598e7d4b4f2399d2800a4c4e363f2a38f9df2297c4288fbb88d8d1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5474 26500 bytes
font_01_sfnt_off00008efb.bin
8228405b2edfb577810dc48047d01ebb0016ae99a069ca397290bf64955e611c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFB 18528 bytes