Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d20057051d3a1b…

MALICIOUS

PDF

74.7 KB Created: 2021-05-04 15:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ba2fd50e4e381311500580b808b1941 SHA-1: cd78f7f402c3e47d977dfdfbb99c838ce6a89603 SHA-256: d6d20057051d3a1bbf3be3816bc0e154e2f9a58c36341d764e6d9d9561dc4bc7
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that uses a fake invoice lure to trick users into downloading it. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it is designed to lead the user to download further malicious content, likely a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f5d0ef63e---kelovutigiditi.pdf
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160904c45aef55---93339157764.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/9107288d1e9de1dec1ba960d801a6990/66036628753.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b87e3d0821eea4e20355e429972737f7/95662704378.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/n368k291qg54blvt2ijag4edh3/56377121245.pdf
    • http://thedreams.cz/files/zasurixo.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca67bd1d28---pazeguve.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160792884d67c5---varefuribejifajilarefufi.pdf
    • http://apexhealthnutrition.com/newerac2c/userfiles/file/15625141667.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f18b33c2d7---78094046470.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16071747ba9a77---lokelupadim.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16088f49de307a---16911530899.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/eboqmfa1k2jfq5kum7s936p8e6/dowavut.pdf
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9069c29e7---gukojeduwuwoxitozaruget.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608748bd72fb3---pazojemazeruzefe.pdf
    • http://capmar.eu/userfiles/file/nuwebovo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=massachusetts+boat+bill+of+sale+form
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfea.bin
daec8be999cd146c2a3501a12300c8da51d67dd77f85eeb8ff76178da3f650e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEA 5040 bytes
font_01_sfnt_off0000f10e.bin
4b1639ee4a7b2e80d2719a77d2c88614c70cd3e1305914760b0dfb64a1a97a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF10E 10808 bytes
font_02_sfnt_off000115e6.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x115E6 4324 bytes

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