Malicious PDF — malware analysis report

Static analysis result for SHA-256 980d39d400c35d7f…

MALICIOUS

PDF

41.9 KB Created: 2021-05-18 06:04:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0bb65eddcafb729c6b216ba3127263df SHA-1: 29e7ce6f3002631ae492a8ae9c15432490848ef0 SHA-256: 980d39d400c35d7ffb3885b3074c2cc028448701d08d37e2b0be514b891659d8
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document exhibits characteristics of a malicious lure, likely designed to trick users into clicking on links presented as a fake CAPTCHA or verification prompt. The presence of numerous external links, including a link farm heuristic, and the ML classifier's high confidence score indicate a malicious intent. The document's content and embedded links suggest it is part of a scam, possibly related to in-game currency or free items, aiming to redirect users to malicious sites or trigger downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/robux-claimer-game-hack
    • http://lookpaineis.com.br/images/roblox-com-r_GM431946152.pdf
    • http://lookpaineis.com.br/images/get-free-coin-master-coins_GM406889139.pdf
    • http://lookpaineis.com.br/images/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://lookpaineis.com.br/images/coin-master-hack-lost-world-2021_GM406889139.pdf
    • http://lookpaineis.com.br/images/free-robux-app-real_GM431946152.pdf
    • http://lookpaineis.com.br/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdf
    • http://lookpaineis.com.br/images/coin-master-free-link-spin_GM406889139.pdf
    • http://lookpaineis.com.br/images/a-lot-of-robux_GM431946152.pdf
    • http://lookpaineis.com.br/images/free-roblox-printables_GM431946152.pdf
    • http://lookpaineis.com.br/images/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://lookpaineis.com.br/images/coin-master-free-coins-app_GM406889139.pdf
    • http://lookpaineis.com.br/images/get-free-robux-now_GM431946152.pdf
    • http://lookpaineis.com.br/images/minecraft-pocket-edition-mods-for-free_GM479516143.pdf
    • http://lookpaineis.com.br/images/free-robux-group_GM431946152.pdf
    • http://lookpaineis.com.br/images/free-spins-coin-master-daily_GM406889139.pdf
    • http://lookpaineis.com.br/images/inappropriate-roblox-games_GM431946152.pdf
    • http://lookpaineis.com.br/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdf
    • http://lookpaineis.com.br/images/free-spins-for-coin-masters_GM406889139.pdf
    • http://lookpaineis.com.br/images/free-robux-codes-no-verification_GM431946152.pdf
    • http://lookpaineis.com.br/images/can-i-get-robux-for-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000487e.bin
b708d9fd49d836a336ed4a4733a20d66b429b8c821d8ec1aeb0b87f89e845cc1
pdf-font-stream PDF embedded font (sfnt) at offset 0x487E 24540 bytes
font_01_sfnt_off000080c9.bin
f8d3cbf6c99adbc4a00682e2952441b72e35b63b7e0e02c452fe01b9b955693e
pdf-font-stream PDF embedded font (sfnt) at offset 0x80C9 18532 bytes