Malicious PDF — malware analysis report

Static analysis result for SHA-256 d121b103e9bf5f1e…

MALICIOUS

PDF

74.5 KB Created: 2021-09-02 19:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 07465d25bebcf628050324844f62fd92 SHA-1: 95a3d6817fd7c96a098f2ab5f59217c9f55817c9 SHA-256: d121b103e9bf5f1e34c8a3b84c432f6e1c6a1b7e3d477ffdc87ef9ff99bafa52
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://laborke.ru/uplcv?utm_term=george+foreman+rotisserie+manual PDF link annotation
    • https://bistakalikotenetwork.com/userfiles/file/xofojativalu.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/160973b4774041---dewup.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/79352d94edbc3e767729338d9e555ca4/mobejefefunaronikojepeso.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/61002675146.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/2c9d68385e699dbd9886a6a3a4819b70/30972057522.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/okcav5dehn5qu8hl6onj4mpfc5/menipexokavoge.pdfIn PDF document text
    • http://controldellaves.com/app/webroot/arxius/file/xomugikowaniva.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f50be2df47f---jidafabixisonowapu.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/rokut.pdfIn PDF document text
    • https://www.profiemg.cz/upload/ck/files/xifar.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/r5qr056c9gghuim2ukv4rab4l6/31664420357.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/3t48oj73fqk0h8hnhigf5uadv0/soluwisonapibufuwu.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/diketilukuli.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/33360415644.pdfIn PDF document text
    • http://mygotour.com/FileData/ckfinder/files/20210530_41F85B5AFA7C704C.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73bea5f301---70241842142.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/551444497.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/6834eab7380f5dd363f9c5fed08ac796/28133547819.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/nunabeketetodukifekozof.pdfIn PDF document text
    • http://bocghedanang.com/media/ftp/file/97354646976.pdfIn PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/xoronuka.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/15367192664.pdfIn PDF document text
    • http://biotop-zamosc.pl/userfiles/file/45521654200.pdfIn PDF document text
    • http://degeninhotel.ru/admin/ckfinder/userfiles/files/fedogifopijorotelosuvu.pdfIn PDF document text
    • http://asijskepotraviny.cz/files/file/xikizato.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bb4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4E 10696 bytes
SHA-256: f798fcc77ab9bc03b9844b7cd2e2c227474c0ddd6e2d801ecd498401363215bc
font_01_sfnt_off0000d3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E1 19172 bytes
SHA-256: c26d23ab1115c6790311b3b8b6e46d620cbc51cca2a70020c8ea613f6f6c02a0
font_02_sfnt_off00010462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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