Malicious PDF — malware analysis report

Static analysis result for SHA-256 e96810e2ee545559…

MALICIOUS

PDF

75.7 KB Created: 2021-09-01 15:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1e7c7d5032ed9573261208fb48d33389 SHA-1: 2fae495377e54c1cd97e35e562a4e67759d0d76e SHA-256: e96810e2ee545559cc6e69a5e9905f4f56fe8dc73929d94113fee94e9b0dba23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to potentially compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics indicate an attempt to lead users to malicious sites, likely for phishing or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://yasacompany.com/upload/files/wopapevi.pdf In PDF document text
    • http://diysmart.net/userfiles/file/feposalonogusikonifanam.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdffb26dece---5568916173.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/66209044395.pdfIn PDF document text
    • http://bakerfamreunion.com/clients/1/13/13be4b03bdabdd3a133c3ee64ed6201b/File/kerugelazoxavowekapuv.pdfIn PDF document text
    • http://china-miyaco.com/img/file/202161625630.pdfIn PDF document text
    • https://yz-yongzhong.com/upfiles/editor/files/48064114520.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0fe36647c---kiraxim.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/62895089072.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/zukiwines.pdfIn PDF document text
    • http://scriptonica.ru/files/files/zafaripuzizatavuk.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/023f5c564c3b1c354641bf72e09238a5/58390478674.pdfIn PDF document text
    • https://transmar.biz/ckfinder/userfiles/files/83891210390.pdfIn PDF document text
    • https://fruitssupplier.com/app/webroot/img/files/29406123648.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/riravurat.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a7e62dcdf6---83613520063.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/d14465f3a9964f8ed06098ac3b4ac604/59093201589.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/83620600821.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161002375a326c---5003360824.pdfIn PDF document text
    • https://www.liftechforklifts.com.au/application/third_party/ckfinder/userfiles/files/zolekivamijixolujixewen.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/merurisuxusitiwiredileja.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb855afc74---tafowabofa.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/vezurabo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=pulling+my+own+tooth+outPDF 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_off0000c5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B8 17140 bytes
SHA-256: cd1bca2a9da62eca6c1bc475643e8a995dc76e519ab2eaba3c98e64eef4543b9
font_01_sfnt_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 10296 bytes
SHA-256: 3763a89d5b9c8a313f73968501cc6a345cfeef422f443321adf0640e2ca4df1b
font_02_sfnt_off00010902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10902 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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