Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f9d9a4f0b76e53…

MALICIOUS

PDF

34.0 KB Created: 2021-06-18 20:43:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 154b8b6df57220df7cafd841811d6a27 SHA-1: a669bb950ad566a25801fe146b5fb41d3de7c144 SHA-256: 67f9d9a4f0b76e539e5b4891ecd864446bf0a0bc696fa85d483846ab095e7ae8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs promote free in-game items and hacks, indicating a lure to trick users into downloading potentially harmful files or visiting malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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-free-no-download-or-sign-up-game-hack
    • https://doingimc.com/image/data/files/free-gifts-coin-master_GM406889139.pdf
    • https://doingimc.com/image/data/files/daily-free-spin-coin-master-link_GM406889139.pdf
    • https://doingimc.com/image/data/files/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • https://doingimc.com/image/data/files/free-robux-no-verification-no-survey_GM431946152.pdf
    • https://doingimc.com/image/data/files/minecraft-hacked-client_GM479516143.pdf
    • https://doingimc.com/image/data/files/roblox-adopt-me-hack_GM431946152.pdf
    • https://doingimc.com/image/data/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • https://doingimc.com/image/data/files/hack-coin-master-without-root_GM406889139.pdf
    • https://doingimc.com/image/data/files/free-spin-link-for-coin-master-haktuts_GM406889139.pdf
    • https://doingimc.com/image/data/files/how-to-get-free-robux-on-pc_GM431946152.pdf
    • https://doingimc.com/image/data/files/free-roblox-clothes-for-your-avatar_GM431946152.pdf
    • https://doingimc.com/image/data/files/robux_GM431946152.pdf
    • https://doingimc.com/image/data/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdf
    • https://doingimc.com/image/data/files/free-spin-link-for-coin-master_GM406889139.pdf
    • https://doingimc.com/image/data/files/coin-master-hacks-no-human-verification_GM406889139.pdf
    • https://doingimc.com/image/data/files/real-coin-master-free-spins_GM406889139.pdf
    • https://doingimc.com/image/data/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://doingimc.com/image/data/files/free-robux-complete-surveys_GM431946152.pdf
    • https://doingimc.com/image/data/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • https://doingimc.com/image/data/files/roblox-got-talent-piano-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_off00002d12.bin
7a53d517428ae2591a0fc28e47e9210f9ae412b7dc9a7edc02417ebe82cf5100
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D12 22212 bytes
font_01_sfnt_off00005e84.bin
cf76fe032545e3c0b26003ea31b5700aad7d7ea24a665817e0e85bb104ec5cdd
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E84 19452 bytes