Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3749d4a6cc240c4…

MALICIOUS

PDF

45.5 KB Created: 2021-06-08 08:54:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e3ed317dcf028ad0f911a1e5ebe43ac9 SHA-1: 73b55bfce2b1ff66de940bd904ce1d67e03b414b SHA-256: c3749d4a6cc240c48c442f8327d89f26fa25b6664cb20cea65b4585bc98989b0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a link farm, designed to attract users with lures related to game hacks and free in-game currency. It contains numerous embedded URLs pointing to other PDFs, many of which are SEO-optimized with keywords like 'Roblox' and 'Coin Master'. The presence of a "download button" heuristic further suggests a deceptive user interaction flow. While no scripts were explicitly extracted, the overall structure and embedded URLs indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/raindrop-hack-for-roblox-game-hack PDF link annotation
    • https://reggieslockandkey.com/images/freespinandcoin-blogspot-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/roblox-free-robux-simulator_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-roblox-online-no-download_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/how-to-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://reggieslockandkey.com/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-pokemon-go-accounts-level-35_GM1094591345.pdfIn PDF document text
    • http://reggieslockandkey.com/images/can-you-hack-for-robux_GM431946152.pdfIn PDF document text
    • https://reggieslockandkey.com/images/pokemon-go-free-items-code_GM1094591345.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-hack-spins-app_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://reggieslockandkey.com/images/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5075 26608 bytes
SHA-256: a9684b3ff718bd85f199a57160c475af98d90ea36a421606734fc26e1693fb5b
font_01_sfnt_off00008de2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DE2 18816 bytes
SHA-256: e72acbdb09358dc463908a0ab0986ecc15112b00fd1795986af4e18cbdd663db

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