Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca874ab6be8b009…

MALICIOUS

PDF

84.4 KB Created: 2021-07-07 14:17:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c0acde5775b642948449de1e80126bc3 SHA-1: 7403fd617c06bb002ad82a2273c91950170820a1 SHA-256: 0ca874ab6be8b009976df119df6acad100041e83dff20f986299916717cc5721
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing or malware distribution lure. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to obscure the true destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for distributing further malware or conducting phishing attacks. No scripts were extracted, but the embedded URLs are the primary indicators of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://smidgel.ru/uplcv?utm_term=gallagher+premiership+results PDF link annotation
    • http://zap-interactive.com/uploads/files/70427584086.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/ba4228793a21fec96b66d77137a5c2d0/62157267698.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d0d7039715---tusenesibup.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/eqf5pard3vaj5vr6fb28brfejn/bogejuxakefufetowoxavax.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608806c190801---14201482349.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad57cb5157---71094949090.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83afd1cd4---mokuduravop.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e9fbc457ab38b3b4d1e3aa8ddeaf7af6/12829204523.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/h9etfsn5ng6nuo2b43i7gmqh1r/38721537768.pdfIn PDF document text
    • http://sequoia60.com/clients/875776/File/gupojowuza.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/606f23cc3bf770f11b835c08183401c7/51163957706.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/vanibumadonaxezu.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd8400a03d---zedajup.pdfIn PDF document text
    • http://kristenpell.com/userfiles/files/disoxuvipodegurogu.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/1d2f856044fff9bce925cfaf6cb0e489/rujujevure.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf55088de5---wasivesise.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077890eccc81---nefavurir.pdfIn PDF document text
    • http://olneyjune65.com/clients/d/dc/dcef5d22f85ec69f5810ba62c2e8cf46/File/8475950172.pdfIn PDF document text
    • http://halongbaycruises.org/upload/files/gezopu.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8cbf27acd---32492501264.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/gokawugagepanesur.pdfIn PDF document text
    • http://groupkaishan.com/d/files/52592904015.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/44733355992.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/ximiwesetumoreboniva.pdfIn PDF document text
    • http://flexa.cz/docs/file/51421288989.pdfIn PDF document text
    • http://work4shop.cz/userfiles/file/78680770924.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/09kjocr9bveqku6f21kefp3tn6/3396949798.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE946 10612 bytes
SHA-256: 3871aa710089e5ec9d4c4750d6e5d22fd97f17cc97ca441e0991cb74bf356906
font_01_sfnt_off0001018b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018B 16500 bytes
SHA-256: 733d0896de14afbba046feaaf21027b6c4ad24bd05b1ade11bb0cbd3adda1ef6
font_02_sfnt_off00012c27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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