Malicious PDF — malware analysis report

Static analysis result for SHA-256 252d268603b6f025…

MALICIOUS

PDF

85.2 KB Created: 2021-06-28 16:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 0b4733b3c7fefac1f7116e06ea1afac1 SHA-1: 226944472f2797d9e1c2a2160c67c161344fdf56 SHA-256: 252d268603b6f025d2f3c58c6fad3eb2ec3498a24948af25bfbdde4ff152c052
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host and distribute further malicious content. The PDF itself acts as a link farm, directing users to potentially harmful files hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/jb541p9qg2oi26shem7ui3309q/68285464329.pdf In PDF document text
    • http://immodraft.nrw/images/architekten_agentur_images_/file/70263662261.pdfIn PDF document text
    • http://gospel-pour-100-voix.com/fichiers/newsletter/file/fubutozulelepusimumoxon.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/42035848170.pdfIn PDF document text
    • http://gabortech.comadmin/file/85766727137.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/beweg.pdfIn PDF document text
    • http://zjqzzx.com/uploadfile/file/2021061007533973499.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/8ies51h2bpolhk3flo171lpg9q/fatigutumiwipeluzaxaga.pdfIn PDF document text
    • http://iphysiology.ru/upload/38641833608.pdfIn PDF document text
    • https://nnt52.ru/userfiles/file/nixiwabugusot.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/xenenag.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/97749631994.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcc361d5df---nelosewugaj.pdfIn PDF document text
    • http://teaandtiarasottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/kisuw.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/bc0a0aba04c058f9bb131795c6467a54/68521522405.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d87399ab88---tusakosuxukumagefivol.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ab91e627187---49368932288.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f0f3d76fd63d67614d4a67fab57b3720/51285465532.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607218e9d4277---67140073811.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/tetewaza.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca2fc0fc4e---3156516805.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2fa6503a5eb589500b56c5ba7718950e/lomiworosaz.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16095add8aaa64---keruza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=open+source+orchestratorPDF 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_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 17156 bytes
SHA-256: 4c0e005f4b1b1b7f3b2254ff3975e48d74ff2e6a9e95fa9d41ae1a28e91c09e8
font_01_sfnt_off000117fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117FE 10460 bytes
SHA-256: 6ec2b21b97fe1233a0933818b7b45c03a36f0a0f355b4f0e927bd5eba3caaf0c
font_02_sfnt_off00012fbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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