Malicious PDF — malware analysis report

Static analysis result for SHA-256 628c8919085a3433…

MALICIOUS

PDF

33.2 KB Created: 2021-06-30 12:33:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b1dcbde71688388b00dd9739a01d6852 SHA-1: 72b5f8f15a0243a72d9390d6e2213d9295e6d00b SHA-256: 628c8919085a3433ffc19ad9ae25dd27fd6891d87475d7811bf931163ffc442f
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are disguised as game hacks or cheats for popular titles like Roblox and Coin Master. The presence of a 'PDF_SEO_LINK_FARM' heuristic and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The document body explicitly mentions 'All Client Roblox Hack' and includes a call to action, reinforcing the lure for users seeking unauthorized game advantages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/all-client-roblox-hack-game-hack PDF link annotation
    • https://humansci.kyst.com.tw/image/data/files/coin-master-link-today_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/roblox-lawsuit_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-to-lego-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/toolbox-for-mcpe_GM479516143.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/synapse-roblox-hack_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-to-get-tons-of-robux-for-free_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://humansci.kyst.com.tw/image/data/files/free-minecraft-server-hosting_GM479516143.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
font_00_sfnt_off00002af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF4 22688 bytes
SHA-256: d6712c63a8a89525fde58b9850cf7ae5e9641af763ad8cec218c35c1bc7b8079
font_01_sfnt_off00005d63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D63 18880 bytes
SHA-256: d6e8c51f441ccbf17c51181914b46dcea9ad1d4a2b1c3bdecb845985babcc911

Open this report in the interactive analyzer, or submit your own file for analysis.