Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fd2bf86338daf9a…

MALICIOUS

PDF

45.3 KB Created: 2021-06-07 09:05:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d5d8a99aed4248e52ec2dceef5c6558b SHA-1: 46053bf5ceb3e943ab274913b763ee6e1d34ca55 SHA-256: 5fd2bf86338daf9ae21624aab2419dc4ee6b89582994f239fb042cb3ebeee728
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to an IP address, suggesting a link farm designed to host malicious files. The document body, though heavily obfuscated, contains a URL related to 'free clothes on Roblox', indicating a lure for game-related cheats or exploits. The presence of a PDF URI heuristic and a link farm heuristic strongly suggests this document is part of a phishing or malware distribution campaign.

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.
  • 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 https://netcdn.tw/app/431946152/how-to-get-free-clothes-on-roblox-on-mobile-game-hack
    • http://202.56.165.220/digilab/repository/rbxdemon_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdf
    • http://202.56.165.220/digilab/repository/coin-master-mod-apk-free-download_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/minecraft-pe-apk-free-download_GM479516143.pdf
    • http://202.56.165.220/digilab/repository/aimbot-exe-roblox_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/minecraft-free-download-mac-full-version_GM479516143.pdf
    • http://202.56.165.220/digilab/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/http-blackgamesus-coinmasterhack_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/free-cracked-minecraft-server-hosting_GM479516143.pdf
    • http://202.56.165.220/digilab/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/coin-master-daily-link_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/coin-master-free-spins-and-coins_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/pokemon-go-free-0-iv_GM1094591345.pdf
    • http://202.56.165.220/digilab/repository/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://202.56.165.220/digilab/repository/hacks-dll-para-roblox-bee-swarm-simulator_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://202.56.165.220/digilab/repository/coin-master-free-daily-spins-link_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/coin-master-blogspot-links_GM406889139.pdf
    • http://202.56.165.220/digilab/repository/robloxmatchcom-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005162.bin
ee01fbbc8b1ad98dc2ef417c404da98017bd50b0899e0c01acb9f98dfa931897		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5162 26524 bytes
font_01_sfnt_off00008d58.bin
d87facb43608cbfd52b28dbabaac17a92dc611683cebb8a811a205f866c3edb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D58 18700 bytes

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