Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa48b95cdd5ddb3a…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 19:50:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 020856c923499d008e2a7139d09efb7e SHA-1: 34bee5ca9e1ee7390cf65a91c7888a3696880d24 SHA-256: fa48b95cdd5ddb3a5859ec1a40c05026638d7e696fdc2d63623492877a5969a2
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many of which are structured as a link farm, pointing to sites offering free game-related content. The ML classifier and PDF heuristics strongly indicate malicious intent, likely to trick users into downloading malware or visiting malicious sites. The presence of a 'download button' lure further supports this phishing-like tactic.

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/479516143/how-to-get-minecraft-for-free-on-laptop-game-hack PDF link annotation
    • http://digilib.stimlog.ac.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-get-free-robux-in-games_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-hack-free-2021-blogspot_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-polo-ralph-lauren-free-shirt_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-almost-any-game-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/synapse-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-counterblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://digilib.stimlog.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-t-shirt_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-wknd-strucid-alpha-roblox-lua-script_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/roblox-pf-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-to-hack-roblox-using-nopde-engine-64_GM431946152.pdfIn PDF document text
    • https://digilib.stimlog.ac.id/repository/how-do-you-hack-micah-on-roblox_GM431946152.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_off00003605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3605 22540 bytes
SHA-256: 0fc17a87e4e86ec9064ad00e5ab13a9fdac012eb8c83faf6dcc415b5a3732971
font_01_sfnt_off0000685f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685F 18336 bytes
SHA-256: b646d971b4a48de69496e79329de15073d264ed964b7577fdc93e7feb1447e1a

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