Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c1e5a0b71c6d816…

MALICIOUS

PDF

75.5 KB Created: 2021-05-29 01:21:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 100dd5226ee6a92761eadb5d1e656b1d SHA-1: dd149d57759098546e16c3839eebad94fab250cc SHA-256: 7c1e5a0b71c6d816e5cfd5c9fe253296aee3c2aa3b2e4f09bb8362a0898f9a9b
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs suggests it is designed to redirect users to malicious sites or download further payloads. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, hinting at its generation method and potential use as a lure.

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 https://archism.ru/uplcv?utm_term=examples+of+higher+order+thinking+questions+for+geometry
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b4f4c942da---24367946731.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/11pdj86km3gl9jnpdk5r0l7olv/17880600948.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/363d5c8108aabb0bd3310d8903187833/simirekipuvuserejera.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1b897f082---7067088206.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e7397293e---befubebom.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160984ce66c1d4---19791240073.pdf
    • https://angelsstaff.com/uploads/file/muxinesovovud.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/16trsrhjq547f7t1fq0beunij4/tupup.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609411b117fbf---lobekanigakukul.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096fdb77f73c---lulifizowi.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/9e0d62eb87203cd6e7a981f90745f7b4/26009316639.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16093e1aebd31c---31461052041.pdf
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/paq3pb6988ionho6lsrhjceujf/gofaja.pdf
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c68117629b---sidalofekevogezapip.pdf
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/i562d4dqmm7duu84p2ck4m92u2/75593702240.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/93f3c9a55b3f53129badfba1f8d8acfa/54776569847.pdf
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/4knlpk3oqf6pvhjr8np0vkrjbf/76863117440.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da27.bin
338c98f04bf4716218e763e6b5fa02ed3fb65eb5fceecc618c7938f0c6e85665		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA27 5652 bytes
font_01_sfnt_off0000ed46.bin
c1f7400c1e230fd9a2de7a63af98e94858dbfc8825b49279e9dcdac18d12f794		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED46 10840 bytes
font_02_sfnt_off0001125b.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1125B 4324 bytes

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