Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ea3a14ac1bacdc…

MALICIOUS

PDF

124.0 KB Created: 2021-07-05 00:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a0ead830b73ce0d61586b1aac97befe6 SHA-1: 3a562d976d10d2c9ed5c97aba90921a614ccfb36 SHA-256: c7ea3a14ac1bacdca22ef3e4cf6b5ca0ddb7f9c46f797f700510f2877e14efe9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a large number of embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the embedded links and the phishing/trojan detection strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://eyetracking.pl/userfiles/file/kikozovegi.pdf In PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/0feb184b2bef1a8906a5ae9ff4feb9f9/23368346042.pdfIn PDF document text
    • https://thegioidongphuc.net/ckfinder/userfiles/files/31367384236.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/ca0f150c406fb8ca71cb68d449b300f9/5012304923.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/gapufizususifoxu.pdfIn PDF document text
    • https://paulins.se/anvandarbilder/178/files/bepidilikekeduwi.pdfIn PDF document text
    • https://envomask.com/wp-content/plugins/super-forms/uploads/php/files/52d5d4195ef3ed19ef0a4a0e62473810/laranosow.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a93e0089a9e---jororusimizeb.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16226219834025.pdfIn PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/97715235014.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/bba5d8dca024921b10c58d580fed1e3c/3645032847.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/59902224434.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/9345231871.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082d578d5de7---fanelelewifevoxura.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/mowuzunugipiganaz.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/joperixenemovenufebed.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/jk48cv8bqn9g6sicike37peb36/tuzudipexadivifa.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/rejap.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/91543098959.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf6468cdfa---gebekeruzejutuseviji.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/7r4ghqc61inj38ghd2j75jhoq5/fogopugoxanipe.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/76142435616.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=total+health+clinic+listening+answersPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001698d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1698D 17456 bytes
SHA-256: 85f2664ee3a5429527380f48c70f53cff0806c539e17d59d5ccf513b92f1685c
font_01_sfnt_off000196b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196B1 17776 bytes
SHA-256: eb85bcc88b127998929908a200befb8b103e4f867b8a45167cc102969300dd99
font_02_sfnt_off0001b241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B241 10560 bytes
SHA-256: 947e3a4ca172ea740cb9ca67c7426a9704f4e5209b2aac4ff63ee662b40edc49
font_03_sfnt_off0001ca60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA60 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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