Malicious PDF — malware analysis report

Static analysis result for SHA-256 f743e900295ba7bb…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 07:33:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 97a16f5435f60cece756ff34797465d1 SHA-1: 9a845ed223c001ceaa75fd1dba8e29e4934d0aae SHA-256: f743e900295ba7bbfaad2df4aadae83a803c93ce919788db1840f166e24b2f46
62 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one pointing to a raw IP address, that are likely intended to lead the user to download malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button heuristic further supports a lure-based attack pattern. The document body, though partially garbled, contains references to game hacks and free items, aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.tw/app/406889139/kachifpro-game-hack
    • http://45.115.65.99/__statics/gudangsoal/files/minecraft-free-android_GM479516143.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-no-hack-no-survey_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-hack-a-roblox-account-easy_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/roblox-script-hacks_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/roblox-report-hacker_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-hack-apk-android-1_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/coin-master-free-link-2021_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-roblox-accounts_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-no-generator_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-com-no-verification_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/easy-how-to-get-free-robux_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-robux-easy_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/robux-free-robux_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/how-to-get-roblox-animations-for-free_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-spins-coin-master-twitter_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-robux-no-verification-required_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/free-pet-food-coin-master_GM406889139.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/collect-robux_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/why-wont-cheat-engine-work-on-roblox_GM431946152.pdf
    • http://45.115.65.99/__statics/gudangsoal/files/microsoft-roblox-rewards_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003007.bin
01f41c90dabeb71469cced80e0ddde3238e1a6c65689af88a8298e2a3a72f66a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3007 23264 bytes
font_01_sfnt_off000064cd.bin
72a3da90a05afc5dc46f93167f9d09aeeb78081726754e710800ebd664932104
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CD 18072 bytes