Malicious PDF — malware analysis report

Static analysis result for SHA-256 96dcbc58bb22551c…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 20:37:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b57d0150f1ed2b980c223e16da07bde5 SHA-1: f016e9c7c27c16c353f8dc0696baf5fa81cff170 SHA-256: 96dcbc58bb22551c29ddffe8e3626fb3f5e82f545e2d32a26efbe5ed577d02bf
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which are part of a link farm designed to artificially boost search engine rankings. The primary URL, 'https://netcdn.xyz/app/431946152/how-do-we-get-free-robux-game-hack', suggests a lure related to obtaining free in-game currency or hacks. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent behind the link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/how-do-we-get-free-robux-game-hack PDF link annotation
    • http://bogatyr.com/images/is-roblox-free-on-pc_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://bogatyr.com/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://bogatyr.com/images/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-free-spain_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-free-spins-and-coins-app_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://bogatyr.com/images/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://bogatyr.com/images/how-to-get-free-robux-on-mobile_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_003_off000049cf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49CF 24700 bytes
SHA-256: e114d2e5d84769a68c16713ee08503e5d21ee78b4e3ed333647c2f7d9e05f649
font_01_sfnt_off000081b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B7 18648 bytes
SHA-256: 357fc7c7eb6196ee12ed3080908575177554d85b467bf9142ee0ee232c3cf829

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