Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea0802b404634f85…

MALICIOUS

PDF

93.4 KB Created: 2021-07-18 22:47:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b85c5c795fa3bd0fba47bb8d14e8fb2d SHA-1: ca23055c35a67854f41c3bfe5b2beebd0182124f SHA-256: ea0802b404634f85ac306beb9c21b26f8e6bba9ca71b47fab6d7009354a29635
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to potentially compromised or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://ajivikafinance.com/userfiles/file/jevazekulobenesigakow.pdf In PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16073a900a714e---nonetufopubexenimuzelebu.pdfIn PDF document text
    • http://kennedy-jackson.com/clients/f/f7/f78508644b517540cdb1549d93860f53/File/telizedapemafobagavepikov.pdfIn PDF document text
    • https://egokituz.eus/files/galeria/files/voletubiwenararumukalut.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/nolozexodavadebigopij.pdfIn PDF document text
    • https://magerp.org/upload/files/26233023815.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a49b665a45---lajitibej.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160741b6c54d30---21785070538.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/5787883550.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946b3c71ee8---34805096822.pdfIn PDF document text
    • http://projecthouse.bg/uploads/CKfinder/files/32651897919.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1608702b08557d---362245009.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/junuweg.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/5b33725b6d14e15ba68053c41e16c134/sebunojonudesedo.pdfIn PDF document text
    • https://transpack-krumbach.de/_upload_bilder/_filemanager/file/81359966857.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/13012652192.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/r3u6baer0rg6sv2to3a4vvq0je/38598898235.pdfIn PDF document text
    • https://clickkedai.com/userfiles/file/tononewaniwunatijegede.pdfIn PDF document text
    • https://lasanisports.com/files/49899180333.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/co8ea1td24urdaltk12s20v641/82662687874.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/tegenozuketizubemom.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/d6ab8b4a420afa0afdb1e0071aa8e4ac/88115587565.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/60271362643.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/ocnen3tf9vrdvacro40hhrhcp0/45818300853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=inversely+proportional+graph+linearPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/2ee77d89efbc04557add16029d7d4855/voritewutitafonudedu.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05C 10660 bytes
SHA-256: 12d46d4b6633d9bc7a1af2bd9a011bd2311d598103997a0a9e53c3faa0f08ac5
font_01_sfnt_off000108bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108BC 16156 bytes
SHA-256: d1bbb3ba568b55cd767700f1a3b234d47b12793b912203f1c743773f1dd02db5
font_02_sfnt_off00011e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00013635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13635 18852 bytes
SHA-256: e9b3f28c6cd68a6c5be5137f01cd5ec23cc796ceef56a3959ec719aeb8573e04

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