Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2c286a67f5eff2b…

MALICIOUS

PDF

88.2 KB Created: 2021-09-23 17:31:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: c663005ed2edae0599b05cee834952df SHA-1: 3e4d42616759df6cbcc37a455191cb8234bf8380 SHA-256: b2c286a67f5eff2b5d13650a684c935161fd9da8804c8c4b0653f858a9aa4098
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many of which point to compromised websites or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or to download further payloads. The embedded JavaScript is a primary mechanism for executing malicious actions within the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://shriadinathbank.com/uploads/rigabimovafudovosot.pdf In PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c312d43745---24419874484.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/27185909359.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3e4c4f64e---76880749506.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/36492658113.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/489a725c3f6bdec6f912276449d1d45e/27113371155.pdfIn PDF document text
    • https://claudiodituri.it/uploads/zosab.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/valapixexilirejojus.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/farunopujupugawugus.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/nedafirugori.pdfIn PDF document text
    • http://steinbach.casawell.tw/userfiles/file/vijako.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/51165587682.pdfIn PDF document text
    • https://patriciobanados.cl/upload/file/In PDF document text
    • https://strongpointmarketing.net/userfiles/file/53027751534.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/17876736936.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/15631264716.pdfIn PDF document text
    • http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/47840071775.pdfIn PDF document text
    • http://hotspot-usa.com/js/upload/files/selowawutugurapu.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff9a26741f---69154928014.pdfIn PDF document text
    • http://linklandhotels.com/upfile/editor/files/jemok.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/17665323261.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/161352810494ad---wewiwegidijeb.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/lotelan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=queen+full+movie+watch+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_off0000f62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62C 17520 bytes
SHA-256: d73376322c9330fab20d43a408adad4af3a01549cb708fde2da345e7fc310e8e
font_01_sfnt_off0001232f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1232F 10644 bytes
SHA-256: d838be87a6411ab63522fad93c05a24fe44b2626607e3cffe142eef600e954ce
font_02_sfnt_off00013b80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B80 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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