Malicious PDF — malware analysis report

Static analysis result for SHA-256 900d7730c79bcbd0…

MALICIOUS

PDF

34.7 KB Created: 2021-06-26 19:00:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bb5fe7280c1e5384db7ab2bb8a59cee0 SHA-1: b82931ea83cc61dc8053e8993d73b9470b4a165c SHA-256: 900d7730c79bcbd0eb1978320802141e394287feb9372e536c46c6cb697eb982
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or content aggregation strategy. The primary URL, http://netcdn.co/app/431946152/how-to-open-proxo-roblox-hack-game-hack, is presented as a download for game hacks, indicating a lure for potentially unwanted or malicious software. The ML classifier strongly flagged this PDF as 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/how-to-open-proxo-roblox-hack-game-hack
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/como-tener-hacks-en-jailbreak-roblox_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/how-to-hack-a-account-in-roblox_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/free-roblox-card-generator-need-to-do-nothing_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/hack-that-thing-roblox_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/claim-free-robux-kid-friendly_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/roblox-script-executor-level-7-free-download_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/free-murder-vip-servers-roblox_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/free-robux-giveaway-2_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/get-free-robux-by-completing-offers_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/free-robux-giveaway_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/free-cafe-groups-on-roblox_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/free-roblox-account-dump-2021_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/robux-free-com_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/freer-tiktok_GM835599320.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/the-new-hack-on-roblox_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/roblox-free-online-no-login_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/roblox-free-face-codes_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/how-to-hack-roblox-accounts_GM431946152.pdf
    • https://tangthuphathoc.net/wp-content/uploads/fsqm-files/how-to-make-a-vip-server-on-roblox-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_off00003123.bin
0fd380aa3a5252799932afcfcc24e8c16952771ca748a957e063b5a04df4c4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3123 22180 bytes
font_01_sfnt_off0000624c.bin
7fffe585a040b24a68e1e1a8cdeb5b7c87b26e3e10632923192d98961a56b491		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624C 19148 bytes

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