Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb7ca02b3c04ae6…

MALICIOUS

PDF

75.8 KB Created: 2021-09-01 05:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3ce2fc6bc97c9ec7cc7b54ae3b27c9f7 SHA-1: ef6435d6fda6f48735406e28719b1add76f7592c SHA-256: 0eb7ca02b3c04ae6bbabb0108d891f95921504c7e643946e36150e907395c7a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing or malware distribution lure. It functions as a link farm, with numerous URLs pointing to various domains, including those hosted on compromised WordPress installations. The primary attack pattern involves directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://synerhu.ru/uplcv?utm_term=naphthalene+balls+mosquitoes PDF link annotation
    • http://taiwanquinoafamily.com/shopadmin/upload/files/rowidupipum.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1607966daea362---waturefuponiforija.pdfIn PDF document text
    • http://pokeocncafe.com/uploads/files/kovuvudivawekifaraluril.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16262055396636.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/0cd1900846937e2285c0ef43ddd2634d/34495288568.pdfIn PDF document text
    • https://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/534mgkmnbk4irds7etlkvnrs21/43561119628.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703311a7d0b---sumotoxesonifax.pdfIn PDF document text
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/80983938650.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b4344154fef---fibevazozejosomotamore.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/61da8245853e115619e8f29f06ef7a2c/tegijetanemapodofuvexik.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/fikupisefibuzawizigijok.pdfIn PDF document text
    • http://chretkinia.pl/userfiles/file/fuwirewirawaxonomago.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/wumonegipujujufigisir.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/gateda.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/7858bfre7rste8prk7fafs61r2/78087169779.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16097dfd40a9d7---dafuwilopiz.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/81693837476.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/69iv600d2vem91m56ulqm6clt4/mojuwowoxofovi.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/fb832d6b9ff0c0002395d586e94a6fdc/senukuzoma.pdfIn PDF document text
    • https://zzwgjx.com/d/files/61644983589.pdfIn PDF document text
    • http://xlsferrosilicon.com/d/files/43390769343.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/02e6d40a9775f2104820a02ddf49d7e8/kizupisepugufofexemuva.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/80056279179.pdfIn PDF document text
    • https://euinsuti.ro/app/webroot/files/userfiles/files/lorupegipuwomuk.pdfIn PDF document text
    • http://falegnameriacastiglione.it/userfiles/files/42414033893.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/bolukaxaz.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_off0000c4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A7 16972 bytes
SHA-256: 712cb6b3713e55a2e0f7236deaf2e3ecf902768b5d1d2377db5fe05de7dccc1e
font_01_sfnt_off0000f01c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF01C 10780 bytes
SHA-256: 97b09b48b90b6ef122e16699506e233b6a1bcd7f2e7df588b616a087718ba377
font_02_sfnt_off00010881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10881 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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