Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a82a3b20c46cad3…

MALICIOUS

PDF

48.4 KB Created: 2021-06-08 12:31:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ed8afeef0763bff3d5cd9c8d3aa4d546 SHA-1: 30e6b735b584c11dab2de9634cd0d4dffb7ac50c SHA-256: 0a82a3b20c46cad3ac99cdf0ca2d251d02f22b59ec7c10deab70120ede626aed
102 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs that form a link farm, primarily directing users to download game hacks or cheats for popular games like Roblox and Coin Master. The document body, though partially corrupted, contains references to 'Roblox Hack Fly Download' and a URL pointing to a similar download. This indicates a social engineering tactic to trick users into downloading potentially malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-hack-fly-download-game-hack PDF link annotation
    • http://berntfoto.dk/images/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://berntfoto.dk/images/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/what-tiktok-free-followers_GM835599320.pdfIn PDF document text
    • http://berntfoto.dk/images/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/free-spins-and-coins-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/how-to-get-robux-on-roblox-for-free-ipad_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/roblox-studio-free_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-hack-using-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://berntfoto.dk/images/roblox-dbor-how-to-hack-levels_GM431946152.pdfIn PDF document text
    • http://berntfoto.dk/images/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000521d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x521D 26724 bytes
SHA-256: 434a2b440c8c2b5b2016cb76ddfeb88d0dc1a03923795016065f1a57e83f1b02
font_01_sfnt_off00008e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5D 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9848 19032 bytes
SHA-256: 8fc1903394b67412e383fe63f33fdacaaaab8b70a00d93090d42bd4c94685a54

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