Malicious PDF — malware analysis report

Static analysis result for SHA-256 291a839c5e5287f2…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 13:12:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bcc3962b624b743f48334e02c1276750 SHA-1: 30d8cbc069f6054712a3efd0f73cda675fd35dd5 SHA-256: 291a839c5e5287f2684893982ef3f7bfbc5ea0ad7b551412ddee997d6c32aeaa
102 Risk Score

Malware Insights

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

This PDF document contains numerous embedded URLs and a "link farm" structure, strongly suggesting it is designed to redirect users to external sites for malicious downloads or scams. The document body explicitly mentions "Free Roblox 13 Accounts" and includes URLs pointing to game-related hacks and free currency, indicating a lure for potentially unwanted or malicious software. The ML classifier also flagged this PDF as highly likely to be malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/free-roblox-13--accounts-game-hack
    • http://subarulegacy.com/images/how-to-hack-roblox-games_GM431946152.pdf
    • http://subarulegacy.com/images/free-robux-no-verification-or-sign-up_GM431946152.pdf
    • http://subarulegacy.com/images/free-premium-roblox_GM431946152.pdf
    • http://subarulegacy.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://subarulegacy.com/images/free-redeem-codes-for-robux-october-2021_GM431946152.pdf
    • http://subarulegacy.com/images/free-injector-roblox_GM431946152.pdf
    • http://subarulegacy.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://subarulegacy.com/images/coin-master-free-spin-download_GM406889139.pdf
    • http://subarulegacy.com/images/coin-master-coins-free_GM406889139.pdf
    • http://subarulegacy.com/images/how-to-make-a-group-on-roblox-for-free_GM431946152.pdf
    • http://subarulegacy.com/images/coin-master-hack-ios-download_GM406889139.pdf
    • http://subarulegacy.com/images/how-to-get-free-purple-hair-on-roblox_GM431946152.pdf
    • http://subarulegacy.com/images/robux-hack-without-survey_GM431946152.pdf
    • http://subarulegacy.com/images/free-redeem-roblox-cards-2021_GM431946152.pdf
    • http://subarulegacy.com/images/wwwcoin-master-free-spincom_GM406889139.pdf
    • http://subarulegacy.com/images/robux-hack-no-verifaction-or-passord_GM431946152.pdf
    • http://subarulegacy.com/images/roblox-admin-hack-download-2021_GM431946152.pdf
    • http://subarulegacy.com/images/free-redeemable-roblox-cards-2021_GM431946152.pdf
    • http://subarulegacy.com/images/coin-master-daily-free-spins-link_GM406889139.pdf
    • http://subarulegacy.com/images/roblox-free-robux-2021-august-promocode-yt-hurry-2021202120210_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f5e.bin
7763c5a84cbc18e5c0608399abd75322e990fff84f6f5c81ddab356ffbcbaa79
pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5E 22504 bytes
font_01_sfnt_off0000614e.bin
bee90da4dbdb48c2761f2650c427c0b22d1dc2dce97b22f077df679469ab8e69
pdf-font-stream PDF embedded font (sfnt) at offset 0x614E 19176 bytes