Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9880da494da4d81…

MALICIOUS

PDF

78.5 KB Created: 2021-09-07 10:12:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 40d27ef79461f0589d306ecdfcb4ab4b SHA-1: 169f05b22cb0a4f30ff8fcf51b46f013e4f56ae7 SHA-256: c9880da494da4d81ee7d7a5b4b07ef64364c20f7971f42950451cf63ee7ed33f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, directing users to various compromised websites and potentially malicious PDF files hosted on them, under the guise of a 'profit & loss formula pdf download'. The presence of multiple external URIs and link farms suggests an attempt to distribute malware or phish for credentials through these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b76c4f10a3---garogolokezeneladepiku.pdf In PDF document text
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/5492d44d96636bc2633b0e1bc06b4910/mirukotuxudadokew.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-8-18/20210818231216860375.pdfIn PDF document text
    • https://futurefacesmiami.com/uploads/file/84122832296.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/nurulapofojek.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/93327168199.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7c26d3fbb5---vegasasima.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/zugipoxamozoj.pdfIn PDF document text
    • http://nhasachnguyenvancu.com/Images_upload/files/nitilunezunixibotixam.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/q9rasg0q9frmv64l55rvd923hu/guvagujexevuxojigobawesus.pdfIn PDF document text
    • https://jin-ji.com/upload/files/740934704.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/vijitewiwurezogopazer.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cad2c6244d---94914044070.pdfIn PDF document text
    • http://charivne.info/images/file/gigeratunalaxidifeti.pdfIn PDF document text
    • http://getvisa.ru/images/File/dawixerovudagununem.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/kijabalifokisomijir.pdfIn PDF document text
    • https://hirurgija.me//files/54554074738.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/b2rqhu8ug4ajitgnauetsk9ds6/xozuba.pdfIn PDF document text
    • https://shian-jin.com/UserFiles/files/rolisu.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/a1ae75a9c9ad19b23c41955c5d325793/55295029747.pdfIn PDF document text
    • https://nhathuydesign.com/wp-content/plugins/super-forms/uploads/php/files/hrh40q24lscbrlpmkfjcecjf5c/foxazanagotejexurowekarad.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/sexarufiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=profit+%26+loss+formula+pdf+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_off0000d27e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 9588 bytes
SHA-256: 1b4c83ace835946fe7bbbfad9cdc0ccc2cfa4704c23e6ec584de0ac4c4baf3b3
font_01_sfnt_off0000e73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73F 17484 bytes
SHA-256: 9bba41c74529b3bbddbad7c092c0ae8e87fb929a70081c945f445099a8f68bcf
font_02_sfnt_off000114c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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