Malicious PDF — malware analysis report

Static analysis result for SHA-256 065b5db701960953…

MALICIOUS

PDF

88.7 KB Created: 2021-07-25 23:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 301fc4a510aae5715b64e409b6640d46 SHA-1: 7e5c26b351423ef052da29f1015a72cfd9dabb5f SHA-256: 065b5db7019609537aa1ccda688c7adc372cfdca43e45c64f7bdecdfd50c4fa4
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URI heuristics point towards a malicious document, potentially leveraging embedded JavaScript for further actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f892bc1436---33389062789.pdf In PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/e675f72109e1bdbb39df6013fbc1a229/zokudomoxeporure.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/gogitagonerofoxebalaj.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/70152291139.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1ff2ae713---3441659335.pdfIn PDF document text
    • http://agenziaimmobiliarecannavo.eu/userfiles/files/137479687.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/xufenilapazabavul.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/ja2poou69nc7k02jmimtt6602v/37910290058.pdfIn PDF document text
    • http://ajivikafinance.com/userfiles/file/vevepubofamadoruduv.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/vomezujixejoko.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/a5d0d0be72ce79a85943b9137bcd3520/nurutaxubo.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16084597ed42f5---rejarulusa.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/73372e859ab17d9b76cdab1d03cc2393/73427839343.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096728463050---sutudeti.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/luvetevezosi.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/4cunk2n67pcdb87dcn2dmrdk18/koxixif.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/diwitegowe.pdfIn PDF document text
    • http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/99317257757.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/pumivizoxerubigutinoxataf.pdfPDF link annotation
    • http://stomerijindex.nl/images/uploads/65013457130.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/160b99af16e8b0---56951079845.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ae588d9c2---gukona.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/48750786222.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/bv552lsklp20j6jt611oed3b73/kifubaxipiwis.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=throne+of+glass+series+order+onlinePDF 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_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 16820 bytes
SHA-256: a574625532e6e9f3746e6cb6785d46af4fcf3d428f6740cb84e536fbd8008d78
font_01_sfnt_off0001238e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013ba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BA5 10496 bytes
SHA-256: 3edabad6c770dcfee554466e784f9bdc06f8d3e2ef5ee703ce6f1c3d94bda976

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