Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad94e78607561ae6…

MALICIOUS

PDF

73.5 KB Created: 2021-05-13 17:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cece140a5a6ef07475af4f7ec97942a SHA-1: 74c47aff3f37f31aebde5015206a9e2e01e91f3b SHA-256: ad94e78607561ae6ca7bd68a7e60e368d019cc6b98480c42b092a580c9f7f563
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to reference benchmarking tools, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 https://infrive.ru/uplcv?utm_term=redshift+benchmark+tool
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/50e2b2801dacc1a22a8636f1a06c92c3/17740150951.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba8574f7eb---femolulosidaserunefujufof.pdf
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/kf79k78n4obo4jveosc5kak0d4/36221768499.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/bk7mhjdg5up65d9uj4gvfp4ns6/pivadapifobot.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0a31b5912678b5dcfd5d4c40980dbb30/ropozazibo.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/64baa5dfbc41a530ae945127c8b6f9d8/pujozuzuwinumupageji.pdf
    • https://dienlanhhonganh.com/images/pic/file/kebizujikalitegofe.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/767227ce5a9eb3199112991a302c12ac/guwajetudisesit.pdf
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16082817eabbd5---3089131498.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16096d05f0f682---fowupovafijukugul.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/5e3c1d341104c8ad7f09a38b56c0c721/13019072813.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080e37215671---53326838652.pdf
    • https://akapacha.com/userfiles/file/rejabakalafetitojorimo.pdf
    • http://mosjob.ru/images/file/piserosenusat.pdf
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/c171ab2fbff517b545babd7884557919/damugusixasamegir.pdf
    • http://adance0112.com/upfile/editor/file/gofasoxo.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160762560b35ac---48416567074.pdf
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160855685d1dbc---52065134858.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0f6.bin
0375a574ac0ac85a17b85dca1bc6d00723ac892e687102f3d3461fe58396a918		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F6 5472 bytes
font_01_sfnt_off0000f367.bin
c6a43ecd3afbf3b9cf872a5cd19c56d72dbd4a50944484e9f4183700e200475f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF367 10600 bytes

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