Malicious PDF — malware analysis report

Static analysis result for SHA-256 5719058f0b49ca41…

MALICIOUS

PDF

82.1 KB Created: 2021-09-04 21:53:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: da90a4ffc82701f48131ab23df7ac16e SHA-1: e3b010df61105d9f575854d81f125e3add0928b5 SHA-256: 5719058f0b49ca41c5cc991b8be96fae59c421f1468c1282130c6f1ed9442b43
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically identifies this pattern. The primary purpose appears to be directing users to external malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=biblia+ortodoxa+rusa+pdf PDF link annotation
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/ed0aaedc51c06854f915bdb3dd86d2bb/zapegajututoforonotuz.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/12457372426.pdfIn PDF document text
    • http://askaudit.ru/price/tebobekeko.pdfIn PDF document text
    • https://btegypt.com/file/49455839712.pdfIn PDF document text
    • http://ckm-machinery.com/userfiles/files/83080530392.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/89116834235.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/raturakirapudesesaxekigiv.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607de277cc2ee---kojosubokavefisugo.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/zarebawubovizuzafefugeri.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/90270303068.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cce26ad649---66833771127.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089be979ce97---fadexubiro.pdfIn PDF document text
    • http://gibisch.com/files/files/bakowixusisusosup.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/67426963872.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/dcd1271703e191562e6518b4fa88c9dc/55835577768.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/62oa10egfut4rjsagpdg15mg0d/16689125595.pdfIn PDF document text
    • http://intrinhgia.com/admin/webroot/upload/image/files/pokawigalinazerabatereko.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077bddb9f067---97250366474.pdfIn PDF document text
    • https://nedimgame.com/calisma2/files/uploads/98506863081.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d7f6ebd5cc8---tapifidenasefexuf.pdfIn PDF document text
    • https://dimensionshoppe.com/alpha/ckfinder/userfiles/files/22398351537.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9ef515a20---54577853438.pdfIn PDF document text
    • http://www.scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/panekexovekaxofajaf.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/nejawogologotewadasawene.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_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 18716 bytes
SHA-256: 9c8dbc9587599606a9f6a5b478c6bf0838d5c73b8c1865507a9a509587895f27
font_01_sfnt_off000108f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12108 10652 bytes
SHA-256: 45c522079d9a6b7dc34ff3e72e84809fe1c773bb083687487cd011e2b89f2b94

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