Malicious PDF — malware analysis report

Static analysis result for SHA-256 61396882d7ac3951…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 21:25:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: beab155ca99416129327fd796985d160 SHA-1: d7426ef66347b482c1c639ee570b791205ebaa2d SHA-256: 61396882d7ac395136d207e40f1dd9de36ebe9b2cdb07944170e35674a6c00eb
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of external links, many of which are related to game cheats and hacks, indicating a link farm or SEO spamming tactic. The ML classifier flagged this PDF with high confidence. The presence of embedded URLs and the document body content, which includes game-related keywords and URLs, supports the conclusion that this document is designed to lure users to external sites, likely for malicious purposes such as malware distribution or phishing.

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/roblox-how-to-get-free-clothes-ios-game-hack
    • http://lib.kunci.or.id/repository/free-robux-on-phone_GM431946152.pdf
    • http://lib.kunci.or.id/repository/get-free-coin-master_GM406889139.pdf
    • http://lib.kunci.or.id/repository/coin-master-free-link-spin_GM406889139.pdf
    • http://lib.kunci.or.id/repository/how-do-you-get-free-robux_GM431946152.pdf
    • http://lib.kunci.or.id/repository/mcpe-master-hack-coins_GM406889139.pdf
    • http://lib.kunci.or.id/repository/hack-nuevo-para-roblox-2021-btools_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-hack-a-account-on-roblox-2021-no-logou_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-hack-an-account-in-roblox_GM431946152.pdf
    • http://lib.kunci.or.id/repository/free-coins-coin-master-iphone_GM406889139.pdf
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • http://lib.kunci.or.id/repository/earn-free-robux-today_GM431946152.pdf
    • http://lib.kunci.or.id/repository/robux-hack-really-works_GM431946152.pdf
    • http://lib.kunci.or.id/repository/claim-free-spins-coin-master_GM406889139.pdf
    • http://lib.kunci.or.id/repository/roblox-lightning-hack_GM431946152.pdf
    • http://lib.kunci.or.id/repository/coin-master-free-spin-daily-bonus_GM406889139.pdf
    • http://lib.kunci.or.id/repository/coin-master-free-spins-link-haktuts_GM406889139.pdf
    • http://lib.kunci.or.id/repository/free-spins-coin-master-links_GM406889139.pdf
    • http://lib.kunci.or.id/repository/how-to-hack-any-roblox-account_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-get-free-vip-server-in-roblox_GM431946152.pdf
    • http://lib.kunci.or.id/repository/how-to-make-a-minecraft-server-for-free-java_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f72.bin
4b1b92ed61e5bc030869511e7baec18f67842157bf77ccf0290b9756c1523c8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F72 22384 bytes
font_01_sfnt_off00006138.bin
2786b7ac63d79b71f8586f242718aef775e634d391df06dea4b88e8ca6f5d441		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6138 19084 bytes

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