Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7e10a8f131efc4…

MALICIOUS

PDF

103.8 KB Created: 2021-08-06 03:15:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 3db7de98f8cf06c0fe1742f61b48882b SHA-1: 8e5d71fa5f9c8899515c40dcc8cd6abf0f29cddb SHA-256: 5f7e10a8f131efc4df72e1b28fd96793fb3c486ce99674adf3bfccbad7bd6cc9
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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 https://chcial.ru/uplcv?utm_term=trailer+licence+plate+holder+canadian+tire PDF link annotation
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085112c94a45---lubin.pdfIn PDF document text
    • http://cobansut.com/userfiles/file/tisegupudutaxixad.pdfIn PDF document text
    • http://dochoiotovn.com/uploads/userfiles/file/potimovolilo.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/giev6gvq1rburoqgndrkppoaq2/32983637293.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/xaxegogiz.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab2ce4c9786---komodemojov.pdfPDF link annotation
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/1c9227b89cbe3205b5573100c637bc1d/rujizi.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/46885964992.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/giviw.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/63695512014.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160cf8a0c6fd95---zeravirobevaxafuzosa.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/9402235496.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/2b36ca797b3ddd92657885f933dda342/kujumeza.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160960b7689f05---wimurozojixikat.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3c14c3a40---gibedogudadakomit.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdc190da877---risepojeritefinisubo.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2bf5cb4b9---suluzodogajitasa.pdfIn PDF document text
    • https://pasarantogel2.com/contents//files/roveboxonigofewobas.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/7facc30a6bf41e18c73cd7da2c087e27/92064571018.pdfIn PDF document text
    • http://luatsubienhoa.com/upload/ck/files/logemim.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/e862fc44ab93d9d26a666629f114be3e/35770180889.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a3a50e518---kewakifupuzuxowigot.pdfIn PDF document text
    • http://englandmatchshirts.com/assets/file/20161036601.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/56162838999.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_off000134a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A1 16580 bytes
SHA-256: a1ed1c5cad1cf802155e27bafbc117ed7afa0c6a23353164df22bfd867912c03
font_01_sfnt_off00015fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC1 10404 bytes
SHA-256: 3330c68c20d34cd3e8943528df9edc196cb49dc89cbb9ae8592973ba68ba5d8c
font_02_sfnt_off0001772a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1772A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1