Malicious PDF — malware analysis report

Static analysis result for SHA-256 906ce8cb12ef5089…

MALICIOUS

PDF

205.8 KB Created: 2021-09-03 00:02:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: be6d593263cabde734b415f65aa16baf SHA-1: 7d068d7adf0c8014991297417f3dec557d4350e6 SHA-256: 906ce8cb12ef5089cee6580f82b48fb21d268862c22b688fefea2ac120ed2b9e
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous links pointing to compromised CMS upload directories, suggesting it's part of a campaign to distribute further malicious content. While no scripts were explicitly extracted, the presence of external links and the nature of the heuristics suggest a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/f62g93tgkvrajdgenksm6ohbd0/44437601918.pdf In PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c43ed945c---30415413199.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609700324a4bc---fafofulitugorenolo.pdfIn PDF document text
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/78441017841.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/7cb9df3193e227814b03e502c976536c/muxexovodatezixurinovade.pdfIn PDF document text
    • https://cooperspick.com/files/53568487713.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606e3e7d1b10e---jikugiduradebuworaseduxu.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/iine160iisbb8pmvgnpgrht338/97924099656.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/94126954230.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073cf84eff3e---64557455856.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16080e5a04c6af---xumewaxebutowejixubusuge.pdfIn PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160791ade4bf0f---7292274161.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a821ded99d2---sokipamukabesarawo.pdfIn PDF document text
    • https://skillmapmagazine.com/ckfinder/userfiles/files/43147027513.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/17652374639.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611baa109cbdb---wobepivizevawapiku.pdfIn PDF document text
    • https://recapress.com/ckfinder/userfiles/files/mujavelulajaka.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/78812456994.pdfIn PDF document text
    • https://vzglavniki.net/data/file/29597799650.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/2lj667st2cvfsauf5532na7lb0/47361494010.pdfIn PDF document text
    • https://gomaihoa.net/upload/files/fibipifepulotazowidoxel.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/f03ff4f1271620ec907ccdfb7fa14826/kovukisikijajuwulo.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4473bfa3d---risajiga.pdfIn PDF document text
    • http://tuning-zone.eu/userfiles/file/koxofu.pdfIn PDF document text
    • http://renovfab-menuiserie.com/userfiles/file/19086146902.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7656be8ed9---podegusudepononufug.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=gilles+deleuze+spinoza+practical+philosophy+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002c0d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002d8e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8E6 20672 bytes
SHA-256: 9e81d1ddcc8f8a16cc96fbed67faa841d9ec388923e228656bc55be845f25bc1
font_02_sfnt_off00030e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30E90 11032 bytes
SHA-256: 8be482bf5cc572de7084857c88e835086ccf9aeeaacb26e19af7da10dc34165c

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