Malicious PDF — malware analysis report

Static analysis result for SHA-256 01d3441546ff9f4e…

MALICIOUS

PDF

33.9 KB Created: 2021-06-18 06:07:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dd7d8e58bfbb7cc183874d45c1638b8c SHA-1: 54486b4cf94ec7bd9fd75f120cce4cebfefaddc1 SHA-256: 01d3441546ff9f4e5358b8af0a8764d70920c5979a0aa0ddf02d9d063f632f98
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links and references to 'free Robux' and game hacks, indicating a social engineering lure. The presence of algorithmically generated URLs and embedded URIs suggests an attempt to redirect users to malicious sites for downloading further payloads. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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/easy-hack-free-robux-game-hack PDF link annotation
    • http://repository.ummy.ac.id//repository/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/picture-of-people-hacking-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-exploit-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/free-robux-no-anti-bot-verification_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/vip-roblox-free_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/robux-gainer_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-free-money-on-roblox-murder-mystery-2_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/cheat-roblox-pet-simulator_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-hack-weight-lifting-sim-in-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hacker-day-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC2 21996 bytes
SHA-256: 2615f5b7060cb50bad4a0894e4d60eb01e7f3d8fa86ae759655c41204b17d4b1
font_01_sfnt_off00005f50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F50 19068 bytes
SHA-256: 195f15705448b04dee3d2bd1b12422b90c8960ab8e2186f30f936685f0768bd1

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