Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f2aa7114449ec7d…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 06:44:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e06ce5615e61fe291e68207e3123d08d SHA-1: c79e7d2a6b6748579ecfc90ff48e667b8a2939db SHA-256: 6f2aa7114449ec7d2b75f7133c1037b44dfdca0f61edb904254fb8db6800e319
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a "download button" lure, suggesting an attempt to redirect users to malicious or scam content. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm further supports a malicious intent. No scripts were extracted, but the overall structure and content point to a phishing or scam campaign.

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.co/app/431946152/free-robux-hack-meme-game-hack PDF link annotation
    • http://sbm-nn.ru/images/how-to-get-free-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-hacks-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/can-you-change-your-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/the-roblox-game-and-online-free-without-login_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/games-that-really-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/farming-simulator-hack-roblox-script_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-dbfp-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/ezy-roblox-hacks-download_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-hack-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/why-can-i-not-hack-robux_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
stream_002_off00002c8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2C8F 22944 bytes
SHA-256: 225ef07533b6abafca8bf72cd146d3de82f23405659075dbfc49a3b645603380
font_01_sfnt_off00005fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FDA 19340 bytes
SHA-256: 14dcdad41c5bf3369ff07bf4fab4ddcdd949f125d1bd3bee680b9d400104bdd2

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