Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e808395b2dac20b…

MALICIOUS

PDF

793.7 KB Created: 2021-08-04 04:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 65f2a677c870d229ca1f2ba6881ed50d SHA-1: bd4aecb3b40d05cb6baec42f596cb9be5acdd62b SHA-256: 1e808395b2dac20bfc524923155d7a1860494951b9d43448495b736f2533c63a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm that points to multiple compromised WordPress sites, suggesting an attempt to distribute further malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm suggest a downloader or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5457

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 http://xn--zb0by3yusal20ak5lcidnwigi.com/ckfinder/userfiles/files/1627407404.pdf In PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9634be537---96742350294.pdfIn PDF document text
    • http://artside.org/data/temp/file/bivurasubulimabali.pdfIn PDF document text
    • https://dagvandearchitectuur.be/_files/file/duwazujij.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073b8021b9c6---14882966355.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b0d00b85c---gatonikew.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfa4cbe094---55735448280.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/7gfqpeb8ktiu41ps036a5rgn1k/16959974232.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608af4577e579---68960303832.pdfIn PDF document text
    • http://rowerowaszkola.pl/imgturysta/files/83813932486.pdfIn PDF document text
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160831a1cc8e83---49229440219.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/87057534525.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/67534492757.pdfIn PDF document text
    • http://dongsimkindergarten.com/upload/files/xilizadekuxuvilexet.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/damot.pdfIn PDF document text
    • https://wcfkenzi.com/ckfinder/userfiles/files/nigerazewodano.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/dad7d83029000fbd5365113f11e3f14e/remigoforadisude.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/29965afde43032db5ea7b4fc25adbe40/70183887680.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/23f4e6c7a400b1c034989321f056a551/tebalujuxalosato.pdfIn PDF document text
    • http://labcoop-jsc.com/wp-content/plugins/super-forms/uploads/php/files/tnk503akk6lmco09h53a36h8mj/79700111721.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/71f6acb51b607b675bc441d5a96f636f/zojuwunitowe.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071d4257552e---gaxinixevalejama.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/33549051414.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/pelusikole.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=craft+solton+chorus+50+reviewPDF 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_off000beb63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000c0386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0386 10972 bytes
SHA-256: d05d62da8b2c33f647a159fab8ec3d1c3856af9e9aa39b4762530eb6ecb3404e
font_02_sfnt_off000c1d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1D1A 22896 bytes
SHA-256: 6a08c8699dd297a7e61b3ffbb8458117d96c362455007eef4ec084358765e023