Malicious PDF — malware analysis report

Static analysis result for SHA-256 315bbc32c502c92c…

MALICIOUS

PDF

100.2 KB Created: 2021-05-19 09:41:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 050f0b46ed653a46a9bdd85bf4560a9a SHA-1: ba1f535451e124a06453d5e18c851ee2ca60c237 SHA-256: 315bbc32c502c92ca1d711cba5d65f80729143baa27f6ce1d53daeb05f04d717
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains embedded URLs that point to potentially malicious PDF files hosted on compromised websites. While no scripts were explicitly extracted, the presence of embedded URLs within a PDF, coupled with high detection scores, suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/vnpbofm2o1r2jnb1q0bcqq37j4/jojawom.pdf
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/d69efe78d93b8c868ed6fe467c7b77d1/bebev.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16074c73e957d8---xetus.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/74d2a6b771b0cae896590583999868ad/25078574078.pdf
    • https://mut-zur-veraenderung-hambuch.de/userfiles/file/78912658271.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac3d1a9ba1---wekoguxamiduvabazurobo.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160743b0f73c37---1449089057.pdf
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160775a3eef783---jilegagawazovuta.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/066ad52e08788df9a076cee6267de515/1778132356.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/8b7457a3690930aebfa5dc8f61bee467/guzurek.pdf
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/9c98a5339f671f26978365a1035a9271/xukezusupetimekokos.pdf
    • http://agnieszkapawlik.com/userfiles/file/54803069385.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfa9dadd06---fobedizaje.pdf
    • http://polyalpan.hu/_user/file/pekurofalaxoxed.pdf
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d6d7845a2---bexukinovavivifu.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/2cb32ee6dd8bcfc795348f38d440c049/ronakedamigafivimanufoz.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/cf9f1e1a98f0619e77540da7cb89d1ca/zaxudigedasuvo.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ad64b19ded---sosamexibobagakenutitixo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=analisi+logica+pdf+zanichelli
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f26.bin
4e7cc19e513d2666c5f10c0018e4b0d5809d5ea690f8ba2e833bb7d9274f0611		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F26 5468 bytes
font_01_sfnt_off0001222d.bin
0f9cfffe3ee43db1a94f5006615e5845307e78d54a1e0c8c8e44b476acb0de5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1222D 5360 bytes
font_02_sfnt_off0001347b.bin
d8a761120e2e392ca88ed00c4f0756aa49c82899ce8fa156a7e4a175585d1f38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1347B 16820 bytes
font_03_sfnt_off00016990.bin
893fe6e7be51ee7a70bfa66c4a3003cd4db60b201ada6fa72481d831fd16a1b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16990 16756 bytes

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