Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c68f415d4d0fff…

MALICIOUS

PDF

42.2 KB Created: 2021-04-29 16:09:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 051f9397a2eeb4493923744036c447d5 SHA-1: 4f9b6c40cd511623dd1a42de9167e127beb4f3f5 SHA-256: 67c68f415d4d0fff8497883953cc8ec2f334bd1e8dced7752f7455553bfe8b10
90 Risk Score

Malware Insights

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

The document impersonates Amazon and uses urgency lures to trick users into clicking a link. The primary malicious URL, https://netcdn.xyz/app/431946152/free-gamepass-roblox-pastebin-game-hack, is presented as a way to obtain free in-game items, which is a common phishing tactic. The ML classifier strongly flagged this PDF as malicious, supporting the phishing and potential exploitation intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 5

  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-gamepass-roblox-pastebin-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/free-gamepass-roblox-pastebin-game-hack PDF link annotation
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/free-oakley-roblox.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-get-free-robux-easy-real.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-robux-free-no-password.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-get-free-robux-otis.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/roblox-dbz-rage-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/como-hackear-cualquier-cuenta-de-roblox.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/hotshotgamers-roblox-cheat.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-access-the-studio-of-a-roblox-game-hack.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-put-in-cheat-codes-roblox.pdfIn PDF document text
    • https://www.tiendagrouppln.com/ckfinder/userfiles/files/how-to-get-8-robux-free.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
stream_003_off00004336.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4336 27032 bytes
SHA-256: 9374c3ad9a7e6fc3356a2d44741943931afba53db8a94873062f4b447d6a1e75
font_01_sfnt_off00008135.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8135 18988 bytes
SHA-256: 581514d9b16ce47f92177f35a378430ca07a300622436c70cb88f512ce2c5bd1

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