Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a47b6e046e77e39…

MALICIOUS

PDF

33.8 KB Created: 2021-07-04 02:04:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ab01f978104f69e67e4dc123857dc387 SHA-1: a072fa84049c31960eda99087ecae96e8da9b291 SHA-256: 4a47b6e046e77e390492e1453aa21c4a1a72cfb303217dfb910d96c67a3574c1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a primary external URI pointing to a site offering 'free Robux' and game hacks. The heuristic findings indicate a link farm strategy, where the PDF itself acts as a lure to drive traffic to these potentially malicious download sites. The document body and extracted URLs strongly suggest a social engineering tactic to trick users into downloading malware or visiting compromised sites.

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.tw/app/431946152/microsoft-bing-free-robux-game-hack PDF link annotation
    • https://pt-mataram.go.id/perpustakaan/repository/speed-hack-roblox-with-nopde-engine_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/apps-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-70-spin-link_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-roblox-hack-no-survey-or-download_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-iphone_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-vehicle-simulator-money-miles-hack_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-roblox-hack-generator-club_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-links-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://pt-mataram.go.id/perpustakaan/repository/roblox-mobile-hacks-4-free-robux_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_off00002e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E39 21960 bytes
SHA-256: 92c33bb0ad197dd2baa0223234690bc3e9f9aa2d00b328c273ca22630b54cc8b
font_01_sfnt_off00005eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB2 19136 bytes
SHA-256: 6574868ecd516cdc95e6406792cdbd3216c6b5fe6b50fcaddc0876f557b9cdc5

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