Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8e18da61683bec…

MALICIOUS

PDF

34.5 KB Created: 2021-06-19 20:36:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f77b9a17c39c5a17397fc13cf14fa989 SHA-1: 7e12ace20dc7b2cbd7e8faa44efc283540ca4af1 SHA-256: 2f8e18da61683bec4fabb692e609d4deb6a27b9b20b3d84cb7526646d461eee2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a large number of embedded URLs, many of which are structured as SEO-friendly links to game-related cheats and currency hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of a "download button" lure reinforces the deceptive nature of the document. The primary goal appears to be directing users to external sites that likely host malicious payloads or facilitate further compromise.

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/roblox-cheats-dlls-game-hack PDF link annotation
    • http://sbm-nn.ru/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-today-instagram_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-link-blogspot_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-models-hack-your-game-in-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-coin-master-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-redeem-roblox-card-hack_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-minecraft-windows-10-for-free_GM479516143.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_off00003039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3039 22456 bytes
SHA-256: 2c70824032f8fefd9f477cbd1b24b28bb32512b79be65ad0e014459760bee87e
font_01_sfnt_off0000621b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x621B 18924 bytes
SHA-256: a291f20aed3a6a56e6a84d52c79834c5d932973456932eb534e74441381bc3d4

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