Malicious PDF — malware analysis report

Static analysis result for SHA-256 564c9028f44c054e…

MALICIOUS

PDF

79.2 KB Created: 2021-09-05 05:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1c983ff64431235d1f26ccb245a705c7 SHA-1: 07d0248429fd5fb3aae8b5bc66b72628dad69cdc SHA-256: 564c9028f44c054edfee3756ed0b5ceed66a34e02d3ca11b76fdd85a3a28ec0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML classifier score. It contains numerous embedded URLs pointing to external sites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The file's structure and the presence of these links indicate it is likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/tonujuvizejusizodorukiv.pdf In PDF document text
    • http://dribblebar.pl/userfiles/file/47468141794.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/88qol5766mhr3uvef28ftmks7g/mufemuj.pdfIn PDF document text
    • http://sieuthibds.net/images/files/2462273845.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/13965569657.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0cf22dac2---5356849028.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/54944723537.pdfIn PDF document text
    • http://theeultimatenetworker.com/ckfinder/userfiles/files/65437622725.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/feec19ea2bdda08caecddfd45cad150a/51619204423.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/40973029382.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9972a78c8---mufefefifibinexop.pdfIn PDF document text
    • http://www.synagoge-stommeln.de/ckfinder/userfiles/files/63426874167.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/nutosoxixigabiwowadov.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/79205423511.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/41784144460.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0b9329cdd---rareravizoziz.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160929c71e2435---21291776569.pdfIn PDF document text
    • https://telechips.com/ckfinder/userfiles/files/96372963296.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/vogomexakoxemubavepaludi.pdfIn PDF document text
    • http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/pitiwazisakabuzatukodeje.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1608238c095a45---12775288873.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a01cced5e39---67362079371.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/ruvigawapekewadup.pdfIn PDF document text
    • https://communeouchamps.fr/userfiles/file/nubujivaveraxumuxo.pdfIn PDF document text
    • http://thsport.dk/ckfinder/userfiles/files/94033647800.pdfIn PDF document text
    • http://kolesnikov.pro/ckfinder/userfiles/files/85736655497.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=network+marketing+pdf+free+downloadPDF 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_off0000d303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD303 16564 bytes
SHA-256: 3f95a3653ea075117c18d6242d779afe47804a31b04c0fb043c9e1ab3966aeed
font_01_sfnt_off0000fdc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115DC 10828 bytes
SHA-256: 452e4f8715853becb359eb99caeec0c41afdd56f4729b537dda81ae156c4fb2f

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