Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee5118185d43b79a…

MALICIOUS

PDF

82.7 KB Created: 2021-09-21 09:07:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0eba78f4087ca581c11c8ca977eaed62 SHA-1: 15e579bd896c204c399d052781559465cf0b899b SHA-256: ee5118185d43b79a91dd4299032ff4a8f335597c45a2bd8b7b0f80c7494279e2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as a link farm and a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting an attempt to redirect users to malicious content, likely for phishing or to download further malware.

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://rewaqousha.net/userfiles/files/videbiligemib.pdf In PDF document text
    • https://toscanafantastica.com/userfiles/file/66688015671.pdfIn PDF document text
    • http://dallapietamarchisio.it/userfiles/files/59029553889.pdfIn PDF document text
    • http://www.mecateengenharia.com.br/ckfinder/userfiles/files/sipajafezibebuturepipaseg.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64758470734.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613108148838a---53780058768.pdfIn PDF document text
    • https://samoinstitute.mn/uploads/assets/file/wijurikexuvex.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/96420118086.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/71974009469.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/7473900284.pdfIn PDF document text
    • http://nobody-films.com/bpms/includes/fckeditor_uploads/userfiles/file/12026679451.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/fuvidisemurob.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/161314401c7811---zonunigutu.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/94771360115.pdfIn PDF document text
    • https://vgi-vn.vn/app/webroot/img/files/71897346525.pdfIn PDF document text
    • http://camel-republic.com/media/userfiles/files/tiwun.pdfIn PDF document text
    • http://firegallery.ru/img/upload/pijalobupukaz.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/7159643857.pdfIn PDF document text
    • https://tiemhoahaibara.com/data/dulieu/files/6931096366.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137a9bfd920b---fijuposudaki.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/rakixugew.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/26084559215.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/vexumu.pdfIn PDF document text
    • http://dbexpertise.fr/catalogue_dynamique/file/povuwasogavo.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/matarobugudikiki.pdfIn PDF document text
    • https://tractorpulling-emmeloord.nl/upload/file/23845150859.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=gta+v+in+android+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_off0000df85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF85 17596 bytes
SHA-256: 3299c94c1decda3493767d3c1cfbe9eb2d3f0894f2489b7d7c8f0072b3096015
font_01_sfnt_off00010d19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12530 10368 bytes
SHA-256: e092f7e9e1f9fcc934ba3f01148f4bdd76c53c0dcff733a6e33d2fa9ea0f9dbc