Malicious PDF — malware analysis report

Static analysis result for SHA-256 719df7c31249819e…

MALICIOUS

PDF

44.7 KB Created: 2021-05-16 18:30:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 258bdfa6118f57770feaf546d1852807 SHA-1: 2c8163831b9d32f3e6ed71a3955c26a0237923ff SHA-256: 719df7c31249819e6e56f4d77c311420724562d4cffd0067aff0c1f8a60838b9
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a visual "download button" lure, indicating an attempt to trick the user into downloading malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs further supports a malicious intent, likely to distribute unwanted software or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • 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.xyz/app/406889139/free-spin-in-coin-master-game-hack
    • https://www.knjiznica-oroslavje.hr/files/minecraft-toolbox-premium-apk_GM479516143.pdf
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdf
    • http://knjiznica-oroslavje.hr/files/free-robux-obby_GM431946152.pdf
    • http://knjiznica-oroslavje.hr/files/promo-code-free-robux_GM431946152.pdf
    • https://www.knjiznica-oroslavje.hr/files/free-spin-coin-master-2021_GM406889139.pdf
    • https://www.knjiznica-oroslavje.hr/files/get-free-robux-2021_GM431946152.pdf
    • https://www.knjiznica-oroslavje.hr/files/coin-master-hack-apk-latest-version-2021_GM406889139.pdf
    • http://knjiznica-oroslavje.hr/files/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://knjiznica-oroslavje.hr/files/free-robux-glitch-2021_GM431946152.pdf
    • https://www.knjiznica-oroslavje.hr/files/hacks-for-roblox-jailbreak_GM431946152.pdf
    • https://www.knjiznica-oroslavje.hr/files/hack-coin-master-apk-download_GM406889139.pdf
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-spin-no-offers_GM406889139.pdf
    • https://www.knjiznica-oroslavje.hr/files/coin-master-spin-link-today_GM406889139.pdf
    • http://knjiznica-oroslavje.hr/files/daily-free-spin-coin-master-link_GM406889139.pdf
    • http://knjiznica-oroslavje.hr/files/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • http://knjiznica-oroslavje.hr/files/rbl-gg-free-robux_GM431946152.pdf
    • http://knjiznica-oroslavje.hr/files/free-coins-coin-master-2021_GM406889139.pdf
    • https://www.knjiznica-oroslavje.hr/files/free-robux-giveaway-live_GM431946152.pdf
    • https://www.knjiznica-oroslavje.hr/files/get-free-coins-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b5b.bin
865ef16201a35bdbca349bdcd4bc88d150ff70e51ebcdc9d140eb6d1daefcbb3
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5B 24340 bytes
font_01_sfnt_off00008368.bin
c1a618813a64314343402b2ec738fc11c4c912460a4c7ae3029924d2f9a229cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x8368 2896 bytes
font_02_sfnt_off00008d4e.bin
d73da77b5a1bbc7a2b5b207bcae6a8efd78ccb1f3c8a04009520d94079973ddb
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4E 17884 bytes