Malicious PDF — malware analysis report

Static analysis result for SHA-256 a166f72567843646…

MALICIOUS

PDF

35.5 KB Created: 2021-06-18 21:21:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 661a728ad5df0d5b17e5d0eeb2d83c34 SHA-1: d0a9486b1b956cdf4bbd961d4c6e98646ffd6740 SHA-256: a166f7256784364629885cc1b73a6158f84393365ed0f08efd7eb5f938eb9577
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous URLs related to 'free Robux' and 'hacks', indicating a phishing or scam attempt to lure users into downloading malicious files. The ML classifier strongly flagged this PDF as malicious. Although no scripts were explicitly extracted, the presence of embedded URLs and the document's theme suggest it is designed to facilitate the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-free-robux-2021-august-promocode-game-hack
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-roblox-place-downloads_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/roblox-hack-the-bank_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/comment-tre-un-hacker-sur-roblox_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/how-to-free-robux-legit_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/robux-hacks-2021_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/how-to-get-free-roblox-codes-2021_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/download-a-free-gater-for-robux-generator_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/noto-clip-hackes-roblox_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/lazyblox-com-free-robux_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/paste-bin-dab-hack-script-roblox_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/roblox-screen-recorder-free_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/jurassic-world-free-roblox_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/free-items-roblox-codes_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/how-to-get-free-robux-immediately_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/btools-hack-roblox-2021-free-download_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/tiktok-views-free_GM835599320.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/rexex-free-robux_GM431946152.pdf
    • http://thinkpro.ca/wp-content/uploads/fsqm-files/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031f4.bin
3bf0c27d524696c4cb8124bb8930001bfa25e8a397024adba5d0955937357914
pdf-font-stream PDF embedded font (sfnt) at offset 0x31F4 22388 bytes
font_01_sfnt_off000063fa.bin
c2ea05a4d0090ac7b1a355478d38d4ef929f2e5a46508dd6e8f77ed98c8f7633
pdf-font-stream PDF embedded font (sfnt) at offset 0x63FA 19696 bytes