Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fae13056135bd9d…

MALICIOUS

PDF

35.4 KB Created: 2021-07-03 20:05:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: aca7942986583a37cc8b54ec9a024c56 SHA-1: 6a912754683a72c4f477f416f516224b7cf88933 SHA-256: 0fae13056135bd9d3ef868909b30feaa95cf7e813a2a3e2cbb90b7f08a75aa5f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body promoting free Robux and game hacks, indicative of a phishing or scam lure. The ML classifier and PDF link farm heuristic strongly suggest malicious intent. While no scripts were explicitly extracted, the embedded links likely lead to malicious websites designed to trick users into downloading further malware or revealing credentials.

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/how-to-get-free-robux-codes-game-hack PDF link annotation
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/dragon-ball-ultimate-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/how-can-you-get-free-robuxs_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/free-robux-promo-codes-for-roblox_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/hack-robux-100-real_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/roblox-hack-tool-2021_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/hack-a-backdoor-into-a-roblox-game_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-on-ipad_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/roblox-robux-hacks-2021-working_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/roblox-easy-hacks-to-get-no-virouses_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/how-do-yoy-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/get-free-robux-info_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/farewell-hack-roblox-one-piece-open-seas_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/roblox-mining-simulator-xray-hack_GM431946152.pdfIn PDF document text
    • https://centralcoastlaundry.com.au/uploaded_files/userfiles/files/how-to-get-free-robux-100-working-2021_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_off000032b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32B3 22576 bytes
SHA-256: 620c9b4277bc4bea5ba7da10904b63ecf4321c7ae7cc09d9dc6e22da25a7a411
font_01_sfnt_off00006504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6504 19156 bytes
SHA-256: d834416b7e9185468f589fe40c9632ebbdbdfe97c28f85986fef52e4c0b1d557

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